*Works so well **Fastly.Cool** for rv that it only requires daytime operation until high temp and humidity are overnight. It is difficult to get to side filters, but back is easily accessible.*
Hard start kits and run caps can be bought typically way cheaper from an appliance parts house rather than an RV service center. All you need to do is take the old caps in with you or write down the values. Usually those roof units have 20 - 40uF on the compressor and a 7.5uF on the fan. Sometimes new caps will eliminate the need for a hard start kit but it is not always the case. Good maintenance would be to change the caps for the fan and the compressor all at once so you know you have all new ones. Also while you had it opened up, it may been a good time to clean the coils out. All these rooftop units are are big window units configured to blow down rather than up and out the front.
Thanks for this video. I think this may be exactly what is wrong with mine. It has never given me any issues until today. We just had days of heavy rainfall so I was thinking it may have something to do with it, but there was no thunder/lightening. I was thinking something must have just gotten wet and needed to dry out, but then I smelled something burning the last time I tried it. I will get up on the roof and see what's going on. I will pay someone to do the work, though. I don't mess with electrical stuff.
Nice vid. I need that exact start capacitor and black thing on top of it (Resistor?) . Seems hard to find online. Any leads? The Amazon ones don't look the same. Thanks
I got a 2006 River Forest camper and I think I blew my capacitator my plugins work but my air conditioner don't work my lights don't work my porch lights don't work and my igniter in the bathroom that ignites my hot water don't work so they left aI guess it's called power supply box it's underneath the cabinets right underneath the breaker box so I replaced it the capacitor I guess it looks like two long batteries I think the other one is bad but at first I did not have any kind of electric I took that old capacitator out of that old one that they left in here and replaced it but what happened was I moved to a new spot and they told me to go get a 220 and for the outside plug in and mine was a 110 so I did that and wired it up and plugged it in and I think that's what blew it so like I said after that happened I went and got them pieces out and replaced it but I think the other one is bad that's why they bought the whole piece for like $150 I got one coming through the mail for like 6 bucks hopefully that does the job but if you know what I'm talking about please help me I live in Kentucky I say you all are far away
Thank you for the video! I have a Duo Therm Brisk Air but AC only, no heat strip, in my RV bedroom. I am on 50 amp power and was using both AC, no problems until the day the bedroom Dometic went out. I started it and it sounded strange (surging sound like couldn't quite get up to speed) turned it off immediately. From then on, won't start, zero noise or movement. I was running living room and bedroom Dometic same time for a many days/weeks(?) again no problem. Then smelled warm electric smell when running both. The smell could have been coming from inverter power/circuit/fuse box (2006 Sierra Sport Toy Hauler by Forest River) or AC, couldn't tell. So I stopped using both AC at same time. No smell when using just living room unit. Could there be faulty wiring in inverter area or burned out circuit? All circuits are on, no fuses blown. I am novice on AC units but saw video that says capacitors carry huge amounts of current even unplugged and though I am mechanically inclined, the capacitor holding voltage now scares me. I am unsure where to start and what to do. Can do repair, just need SAFE instructions. We live 2+ hrs from nearest town and do not have a RV tech in our area. Any ideas or suggestions? Also, could pet hair be getting into the unit causing things to get clogged and not run? Thank you!!
What about for the AC the fan will turn on but as soon as I switch it too ac it tries to turn on but then the breaker trips. We replaced the black capacitor and wires today and it's still tripping the breaker and no ac here in tx
@@desertdweller4316 To short the capacitor place an insulated screwdriver across the three leads of the capacitor. Wiggle it around to make sure the screwdriver blade contacts all three leads at the same time. SHORT RUN CAPACITOR - After you have shorted out the Start Capacitor, repeat the process to short out the Run Capacitor, if applicable.
So I’m having trouble with my RV Ac which is also a demotic brand but I don’t think it’s the compressor capacitor. The compressor kicks ON but never get airflow thru the actual vents inside the RV. I need help as it’s starting to get warm down here in the southern states. Any ideas what it could be?
Could be the fan capacitor or the motor is locked up. If it was me I would turn it on and CAREFULLY try to spin the blower wheel. I am really quick about it because odds are that the motor will kick right on. If so change the cap.
@@rvtechtips874 Thanks for responding! This particular AC unit has a 3 pole capacitor. It’s basically 2 capacitors in one. They do this to save space. I checked all 3 poles and I get a good microfarad reading on all of them. I now need to find out of if there is a squirrel cage air handler fan somewhere in interior of the RV. I’ve never worked on an RV AC so it’s all new to me.
At 4:35 into the video, you detach a black wire, but never reattach it when installing the parts. What happened to the black wire as we have one just like this. Thanks for your help.
At 4:52 we see the old starter capacitor and it has a square thing on the read lead labeled WSX-7. I see you don't use it with the new capacitor. What is it? It is needed when putting in the new capacitor? Does any one know? I'm having a hard time Googling it and finding and answer. Thanks.
MOST Duotherms / Dometics will run on a 25 - 35uF compressor cap and a 7.5uF fan cap stock, you can go up to a 40 but I personally would not leave that as a permanent fix. IF the compressor wont start up then go to your local appliance parts house and get a hard start kit and install that across your compressors cap -> C and HERM terminals.
Question; Isn’t that Dometic a hard start capacitor and the actual run capacitor is the one above it and did you test it to make sure that it was actually viable?
I need help!!!! My rv ac won’t turn on and we bought new capacitators and still nothing I saw a brown and white wires connected to this little black box but they weren’t connected to the capacitator the capacitators had blue and white wires and the other had red and yellow
I have a domectic duo therm and my unit has 3 capacitors, two black smaller ones and the larger one. The fan on ac wont start on its own but runs if you hand spin it to start it moving. Which capacitor is to start the fan? ?
Fan caps are typically 5 or 7.5uF, physically smaller than the compressor cap and the leads will run off to the fan motor (usually brown in those roof units) Your 3 caps are Fan start/run (5 or 7.5uF), Compressor start/run (20 - 40uF) and Compressor hard start (some stupid high value typically 4 numbers long)
We replaced the capacitors in our AC but the compressor still won't run. Any more suggestions? The fan runs, you can feel it and hear it, but the compressor won't run. We had it running with the Generator and the DC from our electric outlet outside. Still the compressor won't kick on. Do you have any suggestions on what would/could cause this?
@@rvtechtips874 The fan works and the Thermostat is working as the Furnace comes on, the fan works when the AC compressor tries to kick on. Thanks for answering my question, I am looking forward to hearing from you again.
I know this is a late comment but did you try a hard start kit? If so when you apply power and if the compressor just hums, take a hammer and tap the metal casing of the compressor and see if it starts running, I know this seems barbaric and unorthodox but it does work sometimes. What happens is the last time the compressor turned off it was under high head pressure (a compressor needs a boost cap when the head pressure is high like on a hot day, this is why it makes louder noises and such), over time (when you are not using it for months on end) the pressure equalizes and the reactions between refrigerant and it's oil stop and sometimes the compressors rotor can become "locked" (called LRA or Locked Rotor Amps) which is due to all the oil running down off the top of the rotor bearings , etc. Longer the unit sits not running the worse the lock gets until you will either have to buy a new unit or replace the compressor. In theory one would turn the compressor upside down but that requires removal of the unit and some maneuvering on a rooftop that may or may not be stable or suitable for such action. Besides I have not had much luck doing this, the hammer tapping worked more. It is ALWAYS a good idea to turn the unit on and let it run for at least 30 min to an hour per month even while the RV is in a storage state off season, especially if the AC unit is over 5 years old and definitely if the RV / unit is stored and freezing temperatures are common, Preventative maintenance is what we call it, those units only have about 1lb charge of refrigerant in them, thats not much compared to your homes AC.
@@Elfnetdesigns Thanks for the advice. We shall try that. Hammers sometimes work, even though it sounds unorthodox. I will let you know after we try it.
@@JohnFletcher57 its fixed dont ask me how but i took one of those voltage testers the cordless ones that light up and beep and took the cover off indoor ac on ceiling was just gonna check wires for current with it that go into the grey box and wala it sounded like i knew it would because it was running so i put cover back on went to wall controller and the damn thing started working right dont ask me what changed cause idk
@@rvtechtips874 nope, I'm lost. I'm not sure if the unit has low refrigerant or just need a capacitor...like you say in the video trying to get save on a new unit lol
You know what I just read the hard start capacitor I installed is not for the penguin series, maybe I need to purchase the one you have? Since my run capacitor is still new...or maybe my run capacitor already went out?? My breaker was also tripped, so yeah fan works but not the compressor
@@rvtechtips874 thanks man I found it on a rv page, was hoping I could get it on Amazon. I hope this fixes it, it would be great to learn these rv systems to keep them running all the time instead of replacing, that's later if I can't fix it I guess..
*Works so well **Fastly.Cool** for rv that it only requires daytime operation until high temp and humidity are overnight. It is difficult to get to side filters, but back is easily accessible.*
Familiarizing me with some of the components was all it took I thank you and all the other good guys that help others with these videos.
Hard start kits and run caps can be bought typically way cheaper from an appliance parts house rather than an RV service center. All you need to do is take the old caps in with you or write down the values. Usually those roof units have 20 - 40uF on the compressor and a 7.5uF on the fan. Sometimes new caps will eliminate the need for a hard start kit but it is not always the case.
Good maintenance would be to change the caps for the fan and the compressor all at once so you know you have all new ones.
Also while you had it opened up, it may been a good time to clean the coils out.
All these rooftop units are are big window units configured to blow down rather than up and out the front.
Thanks for this video. I think this may be exactly what is wrong with mine. It has never given me any issues until today. We just had days of heavy rainfall so I was thinking it may have something to do with it, but there was no thunder/lightening. I was thinking something must have just gotten wet and needed to dry out, but then I smelled something burning the last time I tried it. I will get up on the roof and see what's going on. I will pay someone to do the work, though. I don't mess with electrical stuff.
Where did you order your capacitors and ptcr from. I have two Domestic Duo-,Therm penguin heat pump ac's. Thanks
Thanks for that video, you are the man,
Thanks you need Hollywood to send you a camera man lol, great job
Haha agreed!
What is the new capacitor kit that you used?
Nice vid.
I need that exact start capacitor and black thing on top of it (Resistor?) . Seems hard to find online.
Any leads?
The Amazon ones don't look the same. Thanks
I got a 2006 River Forest camper and I think I blew my capacitator my plugins work but my air conditioner don't work my lights don't work my porch lights don't work and my igniter in the bathroom that ignites my hot water don't work so they left aI guess it's called power supply box it's underneath the cabinets right underneath the breaker box so I replaced it the capacitor I guess it looks like two long batteries I think the other one is bad but at first I did not have any kind of electric I took that old capacitator out of that old one that they left in here and replaced it but what happened was I moved to a new spot and they told me to go get a 220 and for the outside plug in and mine was a 110 so I did that and wired it up and plugged it in and I think that's what blew it so like I said after that happened I went and got them pieces out and replaced it but I think the other one is bad that's why they bought the whole piece for like $150 I got one coming through the mail for like 6 bucks hopefully that does the job but if you know what I'm talking about please help me I live in Kentucky I say you all are far away
Thank you for the video! I have a Duo Therm Brisk Air but AC only, no heat strip, in my RV bedroom. I am on 50 amp power and was using both AC, no problems until the day the bedroom Dometic went out. I started it and it sounded strange (surging sound like couldn't quite get up to speed) turned it off immediately. From then on, won't start, zero noise or movement. I was running living room and bedroom Dometic same time for a many days/weeks(?) again no problem. Then smelled warm electric smell when running both. The smell could have been coming from inverter power/circuit/fuse box (2006 Sierra Sport Toy Hauler by Forest River) or AC, couldn't tell. So I stopped using both AC at same time. No smell when using just living room unit. Could there be faulty wiring in inverter area or burned out circuit? All circuits are on, no fuses blown. I am novice on AC units but saw video that says capacitors carry huge amounts of current even unplugged and though I am mechanically inclined, the capacitor holding voltage now scares me. I am unsure where to start and what to do. Can do repair, just need SAFE instructions. We live 2+ hrs from nearest town and do not have a RV tech in our area. Any ideas or suggestions? Also, could pet hair be getting into the unit causing things to get clogged and not run? Thank you!!
Thanks man this helped
Glad it helped
What about for the AC the fan will turn on but as soon as I switch it too ac it tries to turn on but then the breaker trips. We replaced the black capacitor and wires today and it's still tripping the breaker and no ac here in tx
Thanks this helps
Always short out the capacitor before touching or disconnecting the wires!
How?
@@desertdweller4316 To short the capacitor place an insulated screwdriver across the three leads of the capacitor. Wiggle it around to make sure the screwdriver blade contacts all three leads at the same time. SHORT RUN CAPACITOR - After you have shorted out the Start Capacitor, repeat the process to short out the Run Capacitor, if applicable.
Correct even though AC caps typically have a discharge resistor, NEVER trust that.
So I’m having trouble with my RV Ac which is also a demotic brand but I don’t think it’s the compressor capacitor. The compressor kicks ON but never get airflow thru the actual vents inside the RV. I need help as it’s starting to get warm down here in the southern states. Any ideas what it could be?
Could be the fan capacitor or the motor is locked up. If it was me I would turn it on and CAREFULLY try to spin the blower wheel. I am really quick about it because odds are that the motor will kick right on. If so change the cap.
@@rvtechtips874 Thanks for responding! This particular AC unit has a 3 pole capacitor. It’s basically 2 capacitors in one. They do this to save space. I checked all 3 poles and I get a good microfarad reading on all of them. I now need to find out of if there is a squirrel cage air handler fan somewhere in interior of the RV. I’ve never worked on an RV AC so it’s all new to me.
Hi iv changed out both of mine on my Colman and te ac comprsuer don't stay ki ked on fan and everything else is good anty idea what else it could be
At 4:35 into the video, you detach a black wire, but never reattach it when installing the parts. What happened to the black wire as we have one just like this. Thanks for your help.
At 4:52 we see the old starter capacitor and it has a square thing on the read lead labeled WSX-7. I see you don't use it with the new capacitor. What is it? It is needed when putting in the new capacitor? Does any one know? I'm having a hard time Googling it and finding and answer. Thanks.
what happened to the black wire
What size start cap do i need for a Duotherm Model 59516.601?
MOST Duotherms / Dometics will run on a 25 - 35uF compressor cap and a 7.5uF fan cap stock, you can go up to a 40 but I personally would not leave that as a permanent fix. IF the compressor wont start up then go to your local appliance parts house and get a hard start kit and install that across your compressors cap -> C and HERM terminals.
Question; Isn’t that Dometic a hard start capacitor and the actual run capacitor is the one above it and did you test it to make sure that it was actually viable?
Yes, this is the start capacitor, the larger one is the run/ fan capacitor
?...2 trip charge 200 bucks...parts/200/labor 200=600..new unit 2 trips/200/unit 1k/labor/600...seems like more than 200 dollar savings here...
I need help!!!! My rv ac won’t turn on and we bought new capacitators and still nothing I saw a brown and white wires connected to this little black box but they weren’t connected to the capacitator the capacitators had blue and white wires and the other had red and yellow
How do I jump start my compressor?
I have a domectic duo therm and my unit has 3 capacitors, two black smaller ones and the larger one. The fan on ac wont start on its own but runs if you hand spin it to start it moving. Which capacitor is to start the fan? ?
It will be the one that has 2 brown wires from the motor hooked to it.
Fan caps are typically 5 or 7.5uF, physically smaller than the compressor cap and the leads will run off to the fan motor (usually brown in those roof units)
Your 3 caps are Fan start/run (5 or 7.5uF), Compressor start/run (20 - 40uF) and Compressor hard start (some stupid high value typically 4 numbers long)
I have a Advent ACM 1500 how many capacitors are there in it
how can i test the capacitor?
We replaced the capacitors in our AC but the compressor still won't run. Any more suggestions? The fan runs, you can feel it and hear it, but the compressor won't run. We had it running with the Generator and the DC from our electric outlet outside. Still the compressor won't kick on. Do you have any suggestions on what would/could cause this?
Could be a number of things. Is the fan turning on? Could be as simple as a thermostat
@@rvtechtips874 thermostat works foe the furnace, so it isn't it .?? The fan does run with cool air but not cold
@@rvtechtips874 The fan works and the Thermostat is working as the Furnace comes on, the fan works when the AC compressor tries to kick on.
Thanks for answering my question, I am looking forward to hearing from you again.
I know this is a late comment but did you try a hard start kit?
If so when you apply power and if the compressor just hums, take a hammer and tap the metal casing of the compressor and see if it starts running, I know this seems barbaric and unorthodox but it does work sometimes. What happens is the last time the compressor turned off it was under high head pressure (a compressor needs a boost cap when the head pressure is high like on a hot day, this is why it makes louder noises and such), over time (when you are not using it for months on end) the pressure equalizes and the reactions between refrigerant and it's oil stop and sometimes the compressors rotor can become "locked" (called LRA or Locked Rotor Amps) which is due to all the oil running down off the top of the rotor bearings , etc. Longer the unit sits not running the worse the lock gets until you will either have to buy a new unit or replace the compressor. In theory one would turn the compressor upside down but that requires removal of the unit and some maneuvering on a rooftop that may or may not be stable or suitable for such action. Besides I have not had much luck doing this, the hammer tapping worked more.
It is ALWAYS a good idea to turn the unit on and let it run for at least 30 min to an hour per month even while the RV is in a storage state off season, especially if the AC unit is over 5 years old and definitely if the RV / unit is stored and freezing temperatures are common, Preventative maintenance is what we call it, those units only have about 1lb charge of refrigerant in them, thats not much compared to your homes AC.
@@Elfnetdesigns Thanks for the advice. We shall try that. Hammers sometimes work, even though it sounds unorthodox. I will let you know after we try it.
Put a new capacitor new fan motor new dometic wall unit and ac wont shut off continuously runs without cycling off but it cools good any ideas???
Could be a power issue, drawing too many amps
@@JohnFletcher57 its fixed dont ask me how but i took one of those voltage testers the cordless ones that light up and beep and took the cover off indoor ac on ceiling was just gonna check wires for current with it that go into the grey box and wala it sounded like i knew it would because it was running so i put cover back on went to wall controller and the damn thing started working right dont ask me what changed cause idk
I have a 6 month old capacitor and new hard start kit, the compressor won't kick on but the fan will. Same a/c unit, do you think I need a ptcr?
Possibly. Did the new hard start kit not come with a new ptcr?
@@rvtechtips874 nope, I'm lost. I'm not sure if the unit has low refrigerant or just need a capacitor...like you say in the video trying to get save on a new unit lol
You know what I just read the hard start capacitor I installed is not for the penguin series, maybe I need to purchase the one you have? Since my run capacitor is still new...or maybe my run capacitor already went out?? My breaker was also tripped, so yeah fan works but not the compressor
The correct kit is dometic part number 3311883.000. Give that a shot and see if that fixes it.
@@rvtechtips874 thanks man I found it on a rv page, was hoping I could get it on Amazon. I hope this fixes it, it would be great to learn these rv systems to keep them running all the time instead of replacing, that's later if I can't fix it I guess..
I’m having to replace the 120v cord…
Will this work on model 600315.421? Thx.
Yes it will.
@@rvtechtips874 Thank you!
Two minute delay not annoying at all…
What is the part number for start capacitor
3312303.007
Where do I get this capacitor kit? I have the same problem.
Wow cant hear a thing
Your videos are no good if you don't include the part numbers that it took to fix what you're showing in the video