Thanks Craig! Hands down one of the best, if not the best, informational HVAC/R channels on UA-cam. Really appreciate all the effort you put into making these great videos! Will soon be subscribing to Pateron as well! Thanks again!
Thanks watching learning from ya for years ,,Ive got 24 + years In Love The trade 65 now hopefully 5- 10 more yrs left in me but absolutely best explanation ive ever herd on relays or powerd switches ......we appreciate ya always greatly Thanks
Would love for you to explain a situation in where you would have the fan in the normally open position, and what would be also hooked up in the normally closed position. Also, a situation of your choice on where you would need a relay on a unit and how you would use it to make the job easier. Thanks
Older air handlers use both NO & NC a lot (they work similarly to the fan center control in the video) The fan lead would be connected to terminal 1. Power from a heat sequencer would connect to terminal 2. Since 1 to 2 is NC, the blower would run when the heat sequencer was powering a heating element. Then, line power would connect to terminal 3. Lastly 24 volt C & G would land on the coil connections. When the thermostat has a fan call, G is powered, and the relay then closes the NO circuit between 1 & 3. Power is sent to the blower. Using a similar method, you can even hook different blower speeds up this way. If you wanted a high speed on cooling, hook the black wire from the blower to terminal 4, and the line power that was connected to terminal 3 in the earlier example, would instead connect to terminal 6. Connections at 1 & 2 would be the same as before.
@@rafaellara4122 Keep asking questions and watching this guy's channel. This would be much easier if I could draw a diagram. But, as stated before, the fan lead is connected to terminal 1, which in other cases would be called Common. Line voltage is connected to terminal 3, which is a Normally Open contact. This is the most typical wiring of fan relays. The fan circuit needs to be Normally Open unless there is a call for the fan to run. In which case the Normally Open contacts will close, causing the fan to run.
@@acservicetechchannel Yes, it is voltage wiring and have been looking at your channels, but asked to hopefully you know specifically what video I should go for. Btw when troubleshooting should you touch one end of a wire to another or a piece of metal to one end of the wire to see if it is an opened line?
Hi Craig! Whats the best way to interrupt the G fan when W calls for heat? I have a 90-340 relay that powers up my inducer motor, pressure switch and igniter and all the terms are being used when W calls but when its off could G be routed through the normally closed switch? Or better to use a second relay? Currently G turns on the AC fan for Heat, AC and Fan only. Someone has wired the fan up up with one 90-370 relay. Its has the Hi fan and fan limit switch on the normally closed 2nd from top left pin and the Hi AC fan on the normally open switch top left which causes my fan limit not to function when the unit kicks on. Instead the AC fan kicks on soon as W calls for heat but then when the thermostat is satisfied and powers off the fan relay the normally closed part of that switch brings the fan limit into play where it then does not shut the fan off until the heater cools down. This furnace is so old it does not have a circuit board or flame roll out switches.
I just got a fan relay replaced on my AC unit. Every time the AC turns on, it makes a loud click. I don't remember the old relay being so loud. Is this normal?
Without more information, it's hard to say. My best guess is that it would be ok. However, the general rule of thumb is to NOT replace something with a lower-rated product.
...what should my ohms reading be across the coil points for my R82222B 1067.....i get 0.06 ohms when on the 200 ohms scale so i guess that means 12 ohms. does this mean a good or bad relay. i assume you realize i know nothing about electrical circuits...any help appreciated
Question I'm relocating to America Indianapolis from England I'm a qualified air conditioning and refrigeration engineer with a City and Guilds f gas qualification what test would I need to do in America or could I transfer the qualification ?
I just have the one refrigerant book out right now. The full outline is available on the website www.acservicetech.com . That includes everything needed to prepare a system for refrigerant, refrigerant charging, and troublehooting using superheat and subcooling, delta t, and I also go into airflow and components, thanks! Look up "acservicetech hvac book" for a video on it, thanks!
Do you stand by this model meter? (DL479)? I just got the DL479. Does this meter hold up like the older model UEI 379B? Just doesn't seem as durable. I was a bit disappointed but I wanted to gather your input on the meter. Likes/Dislikes
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Currently in trade school and these vids help so much better understand simple devices
Thanks Craig! Hands down one of the best, if not the best, informational HVAC/R channels on UA-cam. Really appreciate all the effort you put into making these great videos! Will soon be subscribing to Pateron as well! Thanks again!
Thank you very much for your comment William and that would be awesome, thanks!
How do I subscribe to Paterson?
Thank you very much. You explain it step by step without skipping something.
Hands down the best hvac channel. Very detailed. Thank you
Thank you very much L Cross Jr, glad to help!
Thanks for taking the time to make these videos. As a first year apprentice, this is very helpful.
I am really glad that they are helpful!
Thanks so much. I'm using one like the black one to alternate switching between humidifying and dehumidifying my piano.
Great work Craig. Always look forward to your videos. Maybe one of these day you should do a vehicle stock video.
Nando 530, thanks for letting me know what you would like to see!
Thanks watching learning from ya for years ,,Ive got 24 + years In Love The trade 65 now hopefully 5- 10 more yrs left in me but absolutely best explanation ive ever herd on relays or powerd switches ......we appreciate ya always greatly Thanks
Do more Hvacr Videos please and Thank you!
Would love for you to explain a situation in where you would have the fan in the normally open position, and what would be also hooked up in the normally closed position. Also, a situation of your choice on where you would need a relay on a unit and how you would use it to make the job easier. Thanks
The fan and other loads are usually always on the NO contacts. The NC contacts are used less often.
Older air handlers use both NO & NC a lot (they work similarly to the fan center control in the video) The fan lead would be connected to terminal 1. Power from a heat sequencer would connect to terminal 2. Since 1 to 2 is NC, the blower would run when the heat sequencer was powering a heating element. Then, line power would connect to terminal 3. Lastly 24 volt C & G would land on the coil connections. When the thermostat has a fan call, G is powered, and the relay then closes the NO circuit between 1 & 3. Power is sent to the blower. Using a similar method, you can even hook different blower speeds up this way. If you wanted a high speed on cooling, hook the black wire from the blower to terminal 4, and the line power that was connected to terminal 3 in the earlier example, would instead connect to terminal 6. Connections at 1 & 2 would be the same as before.
@@chrisdeanndavison3626 I haven’t seen units with the tan running on the NO contact yet. I’m pretty new at this though
@@rafaellara4122 Keep asking questions and watching this guy's channel. This would be much easier if I could draw a diagram. But, as stated before, the fan lead is connected to terminal 1, which in other cases would be called Common. Line voltage is connected to terminal 3, which is a Normally Open contact. This is the most typical wiring of fan relays. The fan circuit needs to be Normally Open unless there is a call for the fan to run. In which case the Normally Open contacts will close, causing the fan to run.
Great explanation of relays and their troubleshooting steps. Thanks much
Thanks Emanuel!
Where was this video 16 yrs ago? 😂
Great vid!
Great video , troubleshot one today just wanted some more info 👍
شكرا اخي دائما ممير العمل
دائما سعيد للمساعدة! ، شكرا! Always glad to help! Thanks!
Your videos are so helpfully, God bless you
Thank you very much RA! May The Lord Bless You Too!
Thank you so very much.
Glad to help Joe!
another great video please keep them coming
Thanks, will do!
very well explained thanks for the post
Thank you Craig 🙏🙏🙏🙏👌👌👍👍
Glad to help RA!!!
I liked all your good information!!!
You are the best! Thank you!
Glad it helped!
Great video! Thanks so much
You are emazing👏👏👏👏👍👍👍
I am glad that you are enjoying the videos, thanks!
Great video! Is there a video on how to wire these into the system?
When you want to check to see if a relay ( no power) is good you check for continuity but you check for ohmns at the relay coil?
Is there a video to know how to check for a cut low voltage wiring? Got a practical monday and need some info.
Are you talking about low voltage wiring? Look up "acservicetech low voltage 24v wiring, thanks!
@@acservicetechchannel Yes, it is voltage wiring and have been looking at your channels, but asked to hopefully you know specifically what video I should go for. Btw when troubleshooting should you touch one end of a wire to another or a piece of metal to one end of the wire to see if it is an opened line?
Thank you
Thank you for your support!
Hi Craig! Whats the best way to interrupt the G fan when W calls for heat? I have a 90-340 relay that powers up my inducer motor, pressure switch and igniter and all the terms are being used when W calls but when its off could G be routed through the normally closed switch? Or better to use a second relay?
Currently G turns on the AC fan for Heat, AC and Fan only. Someone has wired the fan up up with one 90-370 relay. Its has the Hi fan and fan limit switch on the normally closed 2nd from top left pin and the Hi AC fan on the normally open switch top left which causes my fan limit not to function when the unit kicks on.
Instead the AC fan kicks on soon as W calls for heat but then when the thermostat is satisfied and powers off the fan relay the normally closed part of that switch brings the fan limit into play where it then does not shut the fan off until the heater cools down.
This furnace is so old it does not have a circuit board or flame roll out switches.
Is there anyway to tell if I need a 24v or 240v relay? I have a old electric furnance and the label came off the original.
I just got a fan relay replaced on my AC unit. Every time the AC turns on, it makes a loud click. I don't remember the old relay being so loud. Is this normal?
Great video, if my original Relay is (8FLA 48LRA 277VAC) can I replace it by (8FLA 48LRA 250VAC) ? thanks
Without more information, it's hard to say. My best guess is that it would be ok. However, the general rule of thumb is to NOT replace something with a lower-rated product.
Your hands are too well taken care of for being in the trade lol my dads hands are scared same here old burnt couple scars lol good video my friend :)
Great 👍 👍 👍 video..
Thank you 👍
Your a bad ass bro!!!
...what should my ohms reading be across the coil points for my R82222B 1067.....i get 0.06 ohms when on the 200 ohms scale so i guess that means 12 ohms. does this mean a good or bad relay. i assume you realize i know nothing about electrical circuits...any help appreciated
Question I'm relocating to America Indianapolis from England I'm a qualified air conditioning and refrigeration engineer with a City and Guilds f gas qualification
what test would I need to do in America or could I transfer the qualification ?
Is this n your books? And how many books do you have out?
I just have the one refrigerant book out right now. The full outline is available on the website www.acservicetech.com . That includes everything needed to prepare a system for refrigerant, refrigerant charging, and troublehooting using superheat and subcooling, delta t, and I also go into airflow and components, thanks! Look up "acservicetech hvac book" for a video on it, thanks!
Do you stand by this model meter? (DL479)? I just got the DL479. Does this meter hold up like the older model UEI 379B? Just doesn't seem as durable. I was a bit disappointed but I wanted to gather your input on the meter. Likes/Dislikes
Show switching realy diagram
Why do literally all the HVAC guys insist that "acrosst" is a word?
Would like to see you use actual working motor
Thanks for letting me know Tom!