Brilliant! I found my wife and said you gotta’ watch this! Darren, you and your team are authentically kind! My wife and I love what you do in your spare time for us. Thank you.
It is hard to find information that goes into the nitty gritty of how an ammonia refrigerator works. Yours is that best I have seen so far. Great work.
WOW, this guy is a genius! I just learned more in last 41 minutes than in all of junior high science class lol. You are a gifted teacher! Thank you for taking the time to explain this!
To me, your passion and knowledge and patience and persistence is like an analogy to your video, with the refrigerator, all the components you mentioned water, ammonia, hydrogen, and sodium chromate worked together to produce cold, all the components I mentioned about you produced understanding! Well done sir, the world needs more teachers like you! Dakota is blessed to have you as a father!
That was an excellent explanation of how it all comes together in a complete cycle. I’ve been a HVAC tech for over 30 years and never really understood how it really works , until today. Same principle as a high low refrigerant refrigerator but using a different heat source instead of high compression from a compressor. Thanks buddy .
It's amazing that somebody figured all this out - the proper ratio of water, ammonia, and hydrogen, the proper pressures and temperatures to make this work, and how gravity is used (exploited) to separate the liquids from the gasses, and then to re-combine later in the cycle. And all without any moving parts (except the liquids and gasses themselves).
(Give em one...OORAH!) Youre a true teacher I just learned a process my mind considered a complex mystery up to this point..I'm even more impressed with the level of ingenuity these predecessors were at in a time when horses still pulled ppl around
Whoever figured out how to make an ammonia system work, had to have been a genius. I never knew how an ammonia system worked up until now. I've been an HVACR tech since 1986 but never dabbled in these RV refrigerators. I just bought a 2006 Carson toy hauler (3rd rv) and the fridge doesn't work as good as it should. Now that I understand better how they work I can start working on diagnosing the issue. I have a feeling the upper condenser may be pretty dirty not allowing the proper amount of cooling to happen thus causing a not so cold freezer/fridge. It doesn't work on electric so I have that to diagnose as well and your other videos have explained how that side works. Thanks for the explanation!
I'm trying to understand my Norcold unit before I try to figure out what's wrong with it. Such an awesome video and you explained it very well. Thank you !!! Must say that I find it very impressive that some people came up with this complex idea 100 years ago.
Successfully rebuilt my Norcold 1210T yesterday with help from your videos. I went with the Amish unit. All is well, it's working better than new. Thanks!
This is the best detailed explanation I had come acrossed and most satisfying. All the whys in the chemicals used are answered in this one video. I felt it was important that you did not leave put the double pipes and why there is a rectifier. So clever how they work out the ifeal length of the boiler pipe and diametre and also finding that solution to seperate the water and Amonia vapour. Amazing there is no valves / regulator of some sort. You think they last for ever when maintained leveled. Thank you for your effort in stripping it back to show how much surface area for freezer versus fridge. Diagrams with symbols can not replace practical and visual clues / close ups. Can see how much volume in pipes needed versus the size of that liquid container. Love the idea that it is like reusing the heat from the water like a steam engine with multi chamber. I had a one satisfied fixed in knowledge, finally no need to look any other further you tube videos. Beats all the other fancy presented videos I have clicked on with graphics and exceptional voice overs but lacks the full operational essence. I am no engineerer. Well done on your part and your patience / passion, I value your stripped down displays. I can tell others curious people of this video.
I just purchased my first RV (Travel Trailer) this summer. I came across your videos and I have been learning so much that I have been binge watching them all. As a technical person I appreciate the very in depth and detailed explanations you provide. Thank you so much for doing this, and greetings from across the pond in Victoria BC! If the coho ever gets going again I'd love to drag my trailer out there for a camp trip.
Verry good, I think I get the basics now! I think it would help to explain early on that the whole proces is. Ammonia is dissolved in water. The solution is heated to evaporate the ammonia. The ammonia gas is condensed into liquid and releases heat. The liquid ammonia is used to absorb heat where cooling is needed. The ammonia gas is absorbed back into water, restarting the cycle.
Some folks are just gifted and doing what they are great at, others never find it. You Sir, from my point of view, have found it. Please keep doing this videos. At the time of this post you have 58k subs, your video quality and content are there so once the algorithm figures it out, it'll go up fast and you'll have to quite your day job ha ha ha.
Great explanations of these thermodynamic processes - I have a B.S. with a major in chemistry and minor in math - I don't think I could do better than you did - nice work! Folks, if you want to get a deep understanding of how your RV fridge works, watch this video (a couple of times)!
I had to go and look at my rm2193 to check out the tubing. You really explained that well. Now I understand how the process works. Hopefully I can remember half of that. Thanks! Great Video.
Alright I've watched a few of your videos. This is the one. This was information over load. Very well discussed. Thank you for all your videos. Makes me want to be a tech and learn more
You mentioned the PSI was at a couple different levels in this system. Are there ports to check the pressure levels of the gas for trouble shooting? In the event there is a leak can companies patch the leak (maybe solder) and recharge the system with a hydrogen/ammonia/water/sodium chromate elixir? I often hear complaints over the ineffectiveness of this cooling method. Do any manufacturers make a dual boiler/evaporative system to double the cooling effect? One day your son will look back on this video and be very proud of his dad. History, theoretical chemistry, applied chemistry, and hands on how things work experience - WOW!!!
It is a sealed system, no port to take a reading from. Troubleshooting isn’t very difficult with these systems. Problems could be, crystallization of the sodium chromate causing a restriction, rusted out and leaking boiler/cooling unit, inadequate heating of the solution and the big one… poor cooling of the condenser. If all is right in that world, physics will do its thing and it will work. But let’s not forget about all the electronics that control this thing.
You’re amazing man thankful for you’re times explaining the cycle of refrigeration.🥀 Note: Dr. John Gorri who invented ice maker from ammonia in 1841. Please keep learning.🌺Thanks.
Very informative video! While you were talking about diagnosing a nonfunctional machine you gave three indications, a yellowish dust( I presume this indicates a breach in the sealed system) a smell of ammonia( also a breach) and a gurgling sound. What would the gurgling sound be a result of? Also you mentioned the sodium chromate crystallizing, how would that occur, what would be the indicator, and is there a way to reverse this?
Most excellent thanks. When they fail, I hear its crystallization, ever cut one up and show that. I did the upsidedown thing on Demetic and worked for about a year. Then it sat in AZ. Now it won't work after the sideways upside-down burping technique. .
Darin, I enjoyed your video! U can see you get really excited as you go through the steps as the ammonia vaporized out of the water the water falls back down then the ammonia vapor is condensed to a liquid, mixes with hydrogen gas. As the hydrogen gas / ammonia liquid pass through the low temperature evaporator you failed to explain how the heat from the freezer and ice box is transferred by conduction, this causing the ammonia to vaporize transferring the heat in refrigerator to the ammonia vapor, I am not clear how the ammonia returns
I believe "the ammonia readily absorbs into the water", water is H2O, so I suppose the extra hydrogen then "off-gasses as the water is going down the hydrogen gas goes back up the tube. How's that, Clear as mud? Lol
Darren I just upgraded my trailer to a 4 year old 27 foot Rockwood with slide outs, I'm testing everything out before taking it on a camping trip. I has a Dometic 7 cubic ft. reefer I'm in Calif. and it has been 100 deg. plus lately and started testing on AC it cools down at night to low 40s but during the day the box will get up to mid 50s. on the coldest setting. Next test on Propane freezer got down to -10 deg. and the box down to 28 deg. I switched to mid temp setting and now the box is running just above 32 deg. and freezer is -4 deg. I guess my question is should the unit work as good on AC as Propane? I have watched your videos on testing the AC heating element but need to get time to get the specs. for my unit before testing. I love your Videos very good instructions and a little humor keep it up.
Great video! My children used to love knowing random dates and the events around them. Makes me happy to know knowledge isn't lost on the next generation. Now for my question:. Have you ever seen the mastic paste actually melt and leak out of a fridge? We just purchased an RV and, the fridge is cold, but something that looks exactly like mastic has run out of freezer/fridge and settled under kitchen cabinets. Just wondered if you've ever seen it and how to repair it? Thanks for all the beautifully explained videos.
Thank you very much I have a camper and always wondered how it used heat to cool my fridge. Im a certified AC refrigeration tech using conventional freon, Compressor, condenser and evaporator and some type of metering device being a cap tube, oraphice, expansion valves etc. But this stuff amazes me more and really seems a bit more complicated. So when the Ammonia goes from the small tube to the big tube it drops in pressure and immediately vaporizes does it drop to the minus 28 degrees right there and does it start to warm up eventually getting to the 11 degrees? I'm trying to grasp all this to explain to my grandson.
Great video. With all that explained, what would cause the freezer (low temp evaporator) to be normal cold (-5°F), while the fridge portion (high temp evaporator) warm at 55°F? A blockage?
Great explanation. I kept waiting for yountonsay "phase state change" when you said evaporation or vaporization. Do you have a vid covering the standard evaporative cooling cycle used in r134a compressor units the residential standard?
I've read an article that said the evaporator on the newer refrigerators will rust after 10-15 years. compared to the 1930's servel refrigerators. i'm surprised they're not using a corrosion resistant stainless steel for the evaporator.
My dometic fridge freezer Cools on 230 volt but will not cool on propane. Burner always lights and stays burning with a good flame. I'm wondering whether I might need to replace the flu. Do you have any ideas or maybe a video on a fix for the problem or how replace flu.
Thank you so much for your videos! They are a wealth of knowlegde, especially for us diy`ers! Im not sure if you reply to comments/questions. But ive watched all your fridge videos and didnt see the information I was searching for. I had to remove my fridge to replace a icemaker water line, and have noticed that my absorption vessel, rectifier & absorption tubes are starting to show some rust. I`ve used some steel wool to clean the loose rust off. And am wondering if i can paint these components? And if "yes" what type paint would you recommend? Thanks in advance 😊
Awesome! You've often mentioned the importance of airflow through the outdoor stack, and how properly placed fans can aid that airflow. Where is the best place to install those fans? My trailer has a Norcold refrigerator in a slideout, so all of the venting happens in a side wall with no roof vent.
Install the fans about halfway up. Make sure there is 1” or less clearance between the top fins and the outside wall (use baffles if necessary) to direct the airflow over the fins. Make sure there is insulation on both sides and top of fridge. Install a “turning vane” above the fins to direct air out of the top vent. Doing all of the above lowered my fridge temps from 50° to 33°
Michael Johnston I have a class a motor home with a norcold fridge. Mines is not on a slide wall. My vents on the side of the coach and in the roof. They say put a fan on the roof vent and on the fridge vent cover as well. What say you?
You're the best, Darren. GREAT analogies. Your Pork Ribs "stinkin up the whole kitchen" Simple, and effective. THANKS for all your video's . I'm done....Yeaaaaay!
I have been curious about this cycle for decades and never did the deep dive. Thank you for your service to the education of the rest of us. Great job! It makes me wonder if the people using 12 volt fans to help condensing may be over doing air movement and creating the need for more heat to keep the cycle going? I would really appreciate thoughts about this. Thanks again from Shel in Minnesota.
You talked about levelness in regards to the sodium chromate not having a good path and crystallizes to form blockage...where would this happen?? Thanks also for making much more smarter on this, coldness comes from vaporization!
I tried to run through everything you talked about with meter, they are coming to replace my cooling system, didnt actually check heating element due to the fact that boiler was hot, but what if its not getting hot enough, Absorption coils were cold to touch when boiler was hot!?
Great video, almost too much information. I live is a cold environment. What happens to the water during the winter when refrigerator is not being used? Is it better for the refrigerator to stay pugged into AC and run during winter months?
Thank you Darren , One of the best explanations I have seen . Even our Tech (Trade)school teacher didn't do that good a Job ,, R.J.T traveling Australia
to the water solution and starts the process again. Also can you explain how to resolve an issue when the crystalization of the inhibitor occurs. Thanks for the great video.
Hoping for some advice! I have a domestic fridge/freezer unit in my 2017 genesis supreme. So far my symptoms are (whether I’m on gas or electric), that the freezer gets cold and the refrigerator barely cools. The single fan, located above the freezer fins, immediately comes on (which didn’t happen before) to create airflow when I turn the fridge one. There is also baffling to ensure airflow is pushing through the coils of the fridge. The fridge is not in a slide unit and vents directly out the top. It worked fine three weeks ago and the only thing I did different with trailer storage between now and then vs any other time was turn my disconnect power switch off to completely disconnect power to components inside the trailer while charging the battery. Obviously that should not do anything negative to the fridge though. I need to start some electronic trouble shooting I suppose but don’t know where to start, and really really hope I don’t have to remove the fridge. Other things I’ve noted: there doesn’t appear to be any yellow dust anywhere, water marks along the back side, or cuts/shorts in any of the wiring. When I tested on electric I plugged the fridge directly into my house electric and when I tested on gas I confirmed that the gas was flowing, the igniter lit the furnace and the furnace indeed got nice and hot! The coils on the back of the fridge are getting heated but are never hot to the touch. Mainly just warm…not sure how hot they are suppose to be to trigger that transfer of gas and liquid.
I'm having the same problem with mine. -11 deg in the freezer but only 50 deg in the refrigerator. My takeaway from his class suggests the ammonia is becoming a liquid to soon and losing it's cooling effect. I suspect a blockage. Sure wish he's chime in with some comments.
Informative but confusing but I have an under station on the principle on Ho it works. Now I need the possible trouble shooting thing to. Get to the problem like the new video on icings in the cat box. 👍👐
Darren, can you tell me why a Norcold 1200 would work perfectly on electric but won't cool on propane? I dont know where to start? The flame seems to be clean, long enough & located properly.
Best danged video on the topic! Thank you! I’m checking your other videos, but if you haven’t already done one on increasing efficiency, can you make one? People are using fans in different locations and it’s not clear how or if they actually help.
You're going to love our refrigerator playlist. Just camp out there and watch and we cover quite a few topics on refrigerator efficiency. Including fans and baffling's and everything else.
@@thehomewizard1 I was kicked out of RV repair school for questioning the instructor's experience as a teacher, and the owner of the school's broken promises. For 3 weeks, all we did was read out of 20 year old PDF manuals, which I also questioned. The school was a total scam, but I did get most of my money back.
@@clwbob Wow, that's one of my considerations. After 39 yrs on houses, & 6 yrs in RV fixing what breaks & doing some improvements, sounds like if I want to be "bonafide" it's "only" $10k to get a cert. I'm not sure about the Ante.
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Brilliant! I found my wife and said you gotta’ watch this! Darren, you and your team are authentically kind! My wife and I love what you do in your spare time for us. Thank you.
It is hard to find information that goes into the nitty gritty of how an ammonia refrigerator works. Yours is that best I have seen so far. Great work.
No only is this man smart but he's a GREAT Dad! Well done sir!
oh my! how much I'm. stupid😁 at first i taught. he is kind father.
thanks for mention
Very great explanation and presentation. Thumb up
WOW, this guy is a genius! I just learned more in last 41 minutes than in all of junior high science class lol. You are a gifted teacher! Thank you for taking the time to explain this!
You're very welcome!
Me too!!! I hated history in high school (1979-1982) Now I can't get enough!
Great video! Love too see how the tube in the tube is constructed!
Wow! You’re a natural born teacher, Brother, and Dakota is a great assistant! Thanks so much! 😀
Thanks man I appreciate the time you put into this video. It’s great to see you spending this time with your son.
To me, your passion and knowledge and patience and persistence is like an analogy to your video, with the refrigerator, all the components you mentioned water, ammonia, hydrogen, and sodium chromate worked together to produce cold, all the components I mentioned about you produced understanding! Well done sir, the world needs more teachers like you! Dakota is blessed to have you as a father!
That was an excellent explanation of how it all comes together in a complete cycle. I’ve been a HVAC tech for over 30 years and never really understood how it really works , until today. Same principle as a high low refrigerant refrigerator but using a different heat source instead of high compression from a compressor. Thanks buddy .
Great video Darren. You are really smart and I am just a hillbilly from WV. I just tell my customers, that cooling units are just magic.
Heat makes cold by MAGIC !!!!!!!!! That's my final answer.
It's amazing that somebody figured all this out - the proper ratio of water, ammonia, and hydrogen, the proper pressures and temperatures to make this work, and how gravity is used (exploited) to separate the liquids from the gasses, and then to re-combine later in the cycle. And all without any moving parts (except the liquids and gasses themselves).
I just changed out my cooling unit today on my norcold 6062 I purchased it from the Rv cooling unit warehouse great company to deal with
(Give em one...OORAH!)
Youre a true teacher I just learned a process my mind considered a complex mystery up to this point..I'm even more impressed with the level of ingenuity these predecessors were at in a time when horses still pulled ppl around
Whoever figured out how to make an ammonia system work, had to have been a genius. I never knew how an ammonia system worked up until now. I've been an HVACR tech since 1986 but never dabbled in these RV refrigerators. I just bought a 2006 Carson toy hauler (3rd rv) and the fridge doesn't work as good as it should. Now that I understand better how they work I can start working on diagnosing the issue. I have a feeling the upper condenser may be pretty dirty not allowing the proper amount of cooling to happen thus causing a not so cold freezer/fridge. It doesn't work on electric so I have that to diagnose as well and your other videos have explained how that side works. Thanks for the explanation!
Thanks!
I'm trying to understand my Norcold unit before I try to figure out what's wrong with it. Such an awesome video and you explained it very well. Thank you !!! Must say that I find it very impressive that some people came up with this complex idea 100 years ago.
Great video! Great information and the history is pretty cool 😎
Thank you!
What a great dad! Much respect.
Successfully rebuilt my Norcold 1210T yesterday with help from your videos. I went with the Amish unit. All is well, it's working better than new. Thanks!
Amish unit?? So it’s ice box from the 1800s? Lol
I will have to watch this video at least three times before I start understanding. Thank for sharing, I will look for your other refrigerator videos.
Tell them what youre going to tell them, tell them, and then tell them what youve told them ! Good job
This is the best detailed explanation I had come acrossed and most satisfying. All the whys in the chemicals used are answered in this one video. I felt it was important that you did not leave put the double pipes and why there is a rectifier. So clever how they work out the ifeal length of the boiler pipe and diametre and also finding that solution to seperate the water and Amonia vapour. Amazing there is no valves / regulator of some sort. You think they last for ever when maintained leveled.
Thank you for your effort in stripping it back to show how much surface area for freezer versus fridge. Diagrams with symbols can not replace practical and visual clues / close ups. Can see how much volume in pipes needed versus the size of that liquid container. Love the idea that it is like reusing the heat from the water like a steam engine with multi chamber. I had a one satisfied fixed in knowledge, finally no need to look any other further you tube videos. Beats all the other fancy presented videos I have clicked on with graphics and exceptional voice overs but lacks the full operational essence. I am no engineerer. Well done on your part and your patience / passion, I value your stripped down displays. I can tell others curious people of this video.
Thank you, I just learned more in the first 3:25 of you video then I ever did in school…
Thank you very very much for all your hard work explaining the workings of this type of cooling . Well done and cheers
34:50 for the shortened recap.
I just purchased my first RV (Travel Trailer) this summer. I came across your videos and I have been learning so much that I have been binge watching them all. As a technical person I appreciate the very in depth and detailed explanations you provide. Thank you so much for doing this, and greetings from across the pond in Victoria BC! If the coho ever gets going again I'd love to drag my trailer out there for a camp trip.
Thanks, Bryan! Hope to see you this side of the water!
Thumbs up for the camera man and the kitty. Stay safe.
Oh there's nothing like a good dad explanation
Amazing video sir and the kid is going in the right direction with his dad
Verry good, I think I get the basics now! I think it would help to explain early on that the whole proces is.
Ammonia is dissolved in water.
The solution is heated to evaporate the ammonia.
The ammonia gas is condensed into liquid and releases heat.
The liquid ammonia is used to absorb heat where cooling is needed.
The ammonia gas is absorbed back into water, restarting the cycle.
Thanks for the great explanation of refrigerator magic. This video is by far the best learning tool for ammonia absorption refrigerator knowledge.
Glad it was helpful!
Loved seeing the kitty walk through in the background a few times!
As cute as it is, it could get run over or hurt being off leash.
Some folks are just gifted and doing what they are great at, others never find it. You Sir, from my point of view, have found it. Please keep doing this videos. At the time of this post you have 58k subs, your video quality and content are there so once the algorithm figures it out, it'll go up fast and you'll have to quite your day job ha ha ha.
You're a great teacher!
Wow, thank you!
0:00 Intro
1:17 History
6:23 Cooling with heat?!
11:38 Importance of leveling
12:57 Visual aides and detailed explanation
40:16 Outro
Great explanation of Vaporization. Now I've got to get the ribs out of the freezer.
I just learned so much. I've been wanting to understand how these refrigerators work.
Great explanations of these thermodynamic processes - I have a B.S. with a major in chemistry and minor in math - I don't think I could do better than you did - nice work! Folks, if you want to get a deep understanding of how your RV fridge works, watch this video (a couple of times)!
I had to go and look at my rm2193 to check out the tubing. You really explained that well. Now I understand how the process works. Hopefully I can remember half of that. Thanks! Great Video.
Alright I've watched a few of your videos. This is the one. This was information over load. Very well discussed.
Thank you for all your videos. Makes me want to be a tech and learn more
Thanks for the video! Still a pretty complex process
You mentioned the PSI was at a couple different levels in this system. Are there ports to check the pressure levels of the gas for trouble shooting?
In the event there is a leak can companies patch the leak (maybe solder) and recharge the system with a hydrogen/ammonia/water/sodium chromate elixir?
I often hear complaints over the ineffectiveness of this cooling method. Do any manufacturers make a dual boiler/evaporative system to double the cooling effect?
One day your son will look back on this video and be very proud of his dad. History, theoretical chemistry, applied chemistry, and hands on how things work experience - WOW!!!
It is a sealed system, no port to take a reading from. Troubleshooting isn’t very difficult with these systems. Problems could be, crystallization of the sodium chromate causing a restriction, rusted out and leaking boiler/cooling unit, inadequate heating of the solution and the big one… poor cooling of the condenser. If all is right in that world, physics will do its thing and it will work. But let’s not forget about all the electronics that control this thing.
You’re amazing man thankful for you’re times explaining the cycle of refrigeration.🥀
Note: Dr. John Gorri who invented ice maker from ammonia in 1841.
Please keep learning.🌺Thanks.
Thanks for making the video.
That's awesome how you talk with your about the current events in 1858.
Thanks for taking your time to make this video!
Very informative. Makes understanding and troubleshooting my RV refrigerator easier. Thank you!
Glad it helped! It is our pleasure to educate you on your RV appliances. ;)
Fantastic video...Thanks for taking the time.
Very informative video! While you were talking about diagnosing a nonfunctional machine you gave three indications, a yellowish dust( I presume this indicates a breach in the sealed system) a smell of ammonia( also a breach) and a gurgling sound. What would the gurgling sound be a result of? Also you mentioned the sodium chromate crystallizing, how would that occur, what would be the indicator, and is there a way to reverse this?
Most excellent thanks. When they fail, I hear its crystallization, ever cut one up and show that. I did the upsidedown thing on Demetic and worked for about a year. Then it sat in AZ. Now it won't work after the sideways upside-down burping technique. .
so cool! Awesome job. Always wondered how it works and you did a fantastic job explaining. : )
I think I got it now I watch it again. Now I know. I subbed. Very good video thank you sir.
Darin, I enjoyed your video! U can see you get really excited as you go through the steps as the ammonia vaporized out of the water the water falls back down then the ammonia vapor is condensed to a liquid, mixes with hydrogen gas. As the hydrogen gas / ammonia liquid pass through the low temperature evaporator you failed to explain how the heat from the freezer and ice box is transferred by conduction, this causing the ammonia to vaporize transferring the heat in refrigerator to the ammonia vapor, I am not clear how the ammonia returns
I believe "the ammonia readily absorbs into the water", water is H2O, so I suppose the extra hydrogen then "off-gasses as the water is going down the hydrogen gas goes back up the tube.
How's that, Clear as mud? Lol
That's an amazing explanation.
Darren I just upgraded my trailer to a 4 year old 27 foot Rockwood with slide outs, I'm testing everything out before taking it on a camping trip. I has a Dometic 7 cubic ft. reefer I'm in Calif. and it has been 100 deg. plus lately and started testing on AC it cools down at night to low 40s but during the day the box will get up to mid 50s. on the coldest setting. Next test on Propane freezer got down to -10 deg. and the box down to 28 deg. I switched to mid temp setting and now the box is running just above 32 deg. and freezer is -4 deg. I guess my question is should the unit work as good on AC as Propane? I have watched your videos on testing the AC heating element but need to get time to get the specs. for my unit before testing. I love your Videos very good instructions and a little humor keep it up.
Great video! My children used to love knowing random dates and the events around them. Makes me happy to know knowledge isn't lost on the next generation. Now for my question:. Have you ever seen the mastic paste actually melt and leak out of a fridge? We just purchased an RV and, the fridge is cold, but something that looks exactly like mastic has run out of freezer/fridge and settled under kitchen cabinets. Just wondered if you've ever seen it and how to repair it? Thanks for all the beautifully explained videos.
Thank you very much I have a camper and always wondered how it used heat to cool my fridge. Im a certified AC refrigeration tech using conventional freon, Compressor, condenser and evaporator and some type of metering device being a cap tube, oraphice, expansion valves etc. But this stuff amazes me more and really seems a bit more complicated. So when the Ammonia goes from the small tube to the big tube it drops in pressure and immediately vaporizes does it drop to the minus 28 degrees right there and does it start to warm up eventually getting to the 11 degrees? I'm trying to grasp all this to explain to my grandson.
Thank you ! Always wondered. Great explanation !!!
Great video. With all that explained, what would cause the freezer (low temp evaporator) to be normal cold (-5°F), while the fridge portion (high temp evaporator) warm at 55°F? A blockage?
That last part was funny!
Good video. I'm a refrigeration tech, never worked on ammonia coolers before. U just taught me the whole system. Do you have videos on repairs? Leaks?
Great explanation.
I kept waiting for yountonsay "phase state change" when you said evaporation or vaporization.
Do you have a vid covering the standard evaporative cooling cycle used in r134a compressor units the residential standard?
Explanation starts at 8:00 for background info, actual expl. starts at 12:55
Great job, the problem I'm having is the freezer is working great, but the fridge isn't cooling. Where does the blockage occur?
I've read an article that said the evaporator on the newer refrigerators will rust after 10-15 years.
compared to the 1930's servel refrigerators. i'm surprised they're not using a corrosion resistant stainless steel for the evaporator.
Pretty amazing how they discovered how all this works, must've been a lot of dangerous experiments that went into learning all the stuff wayback when.
My dometic fridge freezer Cools on 230 volt but will not cool on propane. Burner always lights and stays burning with a good flame.
I'm wondering whether I might need to replace the flu. Do you have any ideas or maybe a video on a fix for the problem or how replace flu.
Thank you so much for your videos! They are a wealth of knowlegde, especially for us diy`ers! Im not sure if you reply to comments/questions. But ive watched all your fridge videos and didnt see the information I was searching for. I had to remove my fridge to replace a icemaker water line, and have noticed that my absorption vessel, rectifier & absorption tubes are starting to show some rust. I`ve used some steel wool to clean the loose rust off. And am wondering if i can paint these components? And if "yes" what type paint would you recommend? Thanks in advance 😊
My hats off to the French guys that came up with this..wow
Awesome! Thanks for the detail!
Awesome! You've often mentioned the importance of airflow through the outdoor stack, and how properly placed fans can aid that airflow. Where is the best place to install those fans? My trailer has a Norcold refrigerator in a slideout, so all of the venting happens in a side wall with no roof vent.
Install the fans about halfway up. Make sure there is 1” or less clearance between the top fins and the outside wall (use baffles if necessary) to direct the airflow over the fins. Make sure there is insulation on both sides and top of fridge. Install a “turning vane” above the fins to direct air out of the top vent.
Doing all of the above lowered my fridge temps from 50° to 33°
Michael Johnston I have a class a motor home with a norcold fridge. Mines is not on a slide wall. My vents on the side of the coach and in the roof. They say put a fan on the roof vent and on the fridge vent cover as well. What say you?
I’m learning a lot from your videos. Thanks 🙏
Thank you for another wonderful video.
Do a vid on repair and recharge.
If he knew how to rebuild and recharge he would literally be throwing out half of his discussion
You're the best, Darren. GREAT analogies. Your Pork Ribs "stinkin up the whole kitchen" Simple, and effective. THANKS for all your video's . I'm done....Yeaaaaay!
It seems I learn the best from analogies (so do my three kids). So glad he uses them.
I like that Marine Corps Sticker!
I have been curious about this cycle for decades and never did the deep dive. Thank you for your service to the education of the rest of us. Great job! It makes me wonder if the people using 12 volt fans to help condensing may be over doing air movement and creating the need for more heat to keep the cycle going? I would really appreciate thoughts about this. Thanks again from Shel in Minnesota.
Thank you so very much
"I'm gonna come back to that in a minute."
Very good explanation
Great video! Thanks
You talked about levelness in regards to the sodium chromate not having a good path and crystallizes to form blockage...where would this happen?? Thanks also for making much more smarter on this, coldness comes from vaporization!
I tried to run through everything you talked about with meter, they are coming to replace my cooling system, didnt actually check heating element due to the fact that boiler was hot, but what if its not getting hot enough, Absorption coils were cold to touch when boiler was hot!?
Great video, almost too much information. I live is a cold environment. What happens to the water during the winter when refrigerator is not being used? Is it better for the refrigerator to stay pugged into AC and run during winter months?
Awesome teacher
I'm starting a rebuilding course for those people who want to learn how to rebuild Rv refrigerator cooling units.
Thank you Darren ,
One of the best explanations I have seen . Even our Tech (Trade)school teacher didn't do that good a Job ,,
R.J.T traveling Australia
Wow, thanks!
to the water solution and starts the process again. Also can you explain how to resolve an issue when the crystalization of the inhibitor occurs. Thanks for the great video.
I would like to know more about clogging problem and a serious solution. Help fridge is only one year old
Thanks. This was great. Look forward to the btu discussion. Keep up the good work and really, Thanks for your time and effort!
Why can you not use a similar household size refrigerator coil in the rv fridge as a replacement.
Hoping for some advice! I have a domestic fridge/freezer unit in my 2017 genesis supreme. So far my symptoms are (whether I’m on gas or electric), that the freezer gets cold and the refrigerator barely cools. The single fan, located above the freezer fins, immediately comes on (which didn’t happen before) to create airflow when I turn the fridge one. There is also baffling to ensure airflow is pushing through the coils of the fridge. The fridge is not in a slide unit and vents directly out the top. It worked fine three weeks ago and the only thing I did different with trailer storage between now and then vs any other time was turn my disconnect power switch off to completely disconnect power to components inside the trailer while charging the battery. Obviously that should not do anything negative to the fridge though. I need to start some electronic trouble shooting I suppose but don’t know where to start, and really really hope I don’t have to remove the fridge. Other things I’ve noted: there doesn’t appear to be any yellow dust anywhere, water marks along the back side, or cuts/shorts in any of the wiring. When I tested on electric I plugged the fridge directly into my house electric and when I tested on gas I confirmed that the gas was flowing, the igniter lit the furnace and the furnace indeed got nice and hot! The coils on the back of the fridge are getting heated but are never hot to the touch. Mainly just warm…not sure how hot they are suppose to be to trigger that transfer of gas and liquid.
I'm having the same problem with mine. -11 deg in the freezer but only 50 deg in the refrigerator. My takeaway from his class suggests the ammonia is becoming a liquid to soon and losing it's cooling effect. I suspect a blockage. Sure wish he's chime in with some comments.
I take your a Marine? Retired Army Ranger here. Salute
Informative but confusing but I have an under station on the principle on Ho it works. Now I need the possible trouble shooting thing to. Get to the problem like the new video on icings in the cat box. 👍👐
Well done
Darren, can you tell me why a Norcold 1200 would work perfectly on electric but won't cool on propane? I dont know where to start? The flame seems to be clean, long enough & located properly.
New sub, Wow I learned something today. Well explained, Thank you.
Best danged video on the topic! Thank you! I’m checking your other videos, but if you haven’t already done one on increasing efficiency, can you make one? People are using fans in different locations and it’s not clear how or if they actually help.
You're going to love our refrigerator playlist. Just camp out there and watch and we cover quite a few topics on refrigerator efficiency. Including fans and baffling's and everything else.
Very good information. Thanks!
Another excellent and informative video. Love your stuff. It will be very helpful when I get to RV repair school in January
How was RV school?
Did the school even come close to Darren's informative discussion?
@@thehomewizard1 I was kicked out of RV repair school for questioning the instructor's experience as a teacher, and the owner of the school's broken promises. For 3 weeks, all we did was read out of 20 year old PDF manuals, which I also questioned. The school was a total scam, but I did get most of my money back.
@@clwbob Wow, that's one of my considerations. After 39 yrs on houses, & 6 yrs in RV fixing what breaks & doing some improvements, sounds like if I want to be "bonafide" it's "only" $10k to get a cert.
I'm not sure about the Ante.
thanks great primer