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Lennox Prodigy Playing Games RTU Not Cooling 

HVACR Survival
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This Lennox packaged rooftop unit had a Prodigy 2.0 Unit Controller board that was acting up causing the compressors to short cycle resulting in the main breaker tripping. I have not done a lot of work with the prodigy system so common sense led me to what I found, and I confirmed it with Lennox to verify that was the problem before ordering such an expensive part.
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17 май 2024

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Комментарии : 111   
@timbrown9305
@timbrown9305 5 дней назад
Great to see "REAL" diagnosis. Fantastic !
@HVACRSurvival
@HVACRSurvival 5 дней назад
Thanks 🙏 👍👍
@matthewrichardson2467
@matthewrichardson2467 Месяц назад
Hey Rick, Love your methodical troubleshooting approach, and your take the previous guys assessment with a pinch of salt and you confirm things for yourself.
@Boodieman72
@Boodieman72 Месяц назад
Had a local tech come out to do an AC check on my home. Somehow they managed to short or do something that killed both the circuit board and the wall thermostat. Nice to see a real professional at work.
@HVACRSurvival
@HVACRSurvival Месяц назад
That really sucks, sorry to hear that! Thanks for checking out the video!
@TheGhettoLobster
@TheGhettoLobster Месяц назад
They hooked up the high voltage to the low voltage on the contactor
@jasonjohnsonHVAC
@jasonjohnsonHVAC Месяц назад
Nicely done Rick. Condemning a board is the absolute last thing on my list, whether i originally suspected it or not. You were very detailed and methodical in your approach
@HVACRSurvival
@HVACRSurvival Месяц назад
Cool, thanks! I knew that control board was going to be pretty expensive so I want to be darn sure.
@jasonjohnsonHVAC
@jasonjohnsonHVAC Месяц назад
@HVACRSurvival and you did make sure. Too many people condemn a board without going through the proper steps.
@jaymartin5095
@jaymartin5095 Месяц назад
I had been wondering where you were. Thanks for the update. This one was interesting, eliminating everything else one by one. Then have the vendor confirm it's their board. Nice sleuthing and keeping your cool. Thanks for the education.
@HVACRSurvival
@HVACRSurvival Месяц назад
Thanks Jay! Yep just stupid busy
@gordonborsboom7460
@gordonborsboom7460 Месяц назад
Satturation temps are the ssame yes...just dont forget to reset the refridgerant type on your electronic gauges. This has caused me all kinds of unnecessary grief
@HVACRSurvival
@HVACRSurvival Месяц назад
I know me too🤣🫶 it happens all the time
@jasonyeager9102
@jasonyeager9102 Месяц назад
Same…was working on a walk in freezer (404) on one call and then went to a 410A AC call and was like damn this is low…good thing I noticed before going further.
@ryanisaacson118
@ryanisaacson118 Месяц назад
Yep
@andyread4332
@andyread4332 Месяц назад
Love your work Rick. Keep em coming
@HVACRSurvival
@HVACRSurvival Месяц назад
Than you!
@throttlebottle5906
@throttlebottle5906 Месяц назад
"how dare you" not release videos daily. LOL. I was ready to send search and rescue looking for the roof, rack or cooler you was stuck in. 🤣🤣🙃
@HVACRSurvival
@HVACRSurvival Месяц назад
🤝😅👍👍
@stevencossaboon3237
@stevencossaboon3237 Месяц назад
Nice troubleshooting and job Rick.
@Josh.SPublishingTeam2024I
@Josh.SPublishingTeam2024I Месяц назад
Good video rick from watching your videos i learn alot about these units! 🎉🎉
@HVACRSurvival
@HVACRSurvival Месяц назад
Thanks Josh!
@zekenzy6486
@zekenzy6486 Месяц назад
Great video. Thank you for sharing. Have a nice weekend. I'm so happy to see you back. I see you in next video 💯
@HVACRSurvival
@HVACRSurvival Месяц назад
Thank you, I’m gonna try for another tomorrow but it depends on time
@Dalan612
@Dalan612 Месяц назад
Solid troubleshooting Rick. Thanks for the upload 🤘🏼
@HVACRSurvival
@HVACRSurvival Месяц назад
No problem 👍
@johnstrh1
@johnstrh1 Месяц назад
any other newer guys like me watching, what he said about looking at the temps not the pressures is what really helped me a while ago. when you see 5 or 6 different refrigerants in a day going by temp is so much easier
@HVACRSurvival
@HVACRSurvival Месяц назад
Preach it 🙌
@Brooks.Mechanical.Electric
@Brooks.Mechanical.Electric Месяц назад
It makes so much more sense than trying to memorize pressure for everything you work on. I learned that way and rarely even put much though in the pressures.
@HVACRSurvival
@HVACRSurvival Месяц назад
@Brooks.Mechanical.Electric It just clicked for me early on. It’s amazing how much you hear about pressure when listening to others.
@Brooks.Mechanical.Electric
@Brooks.Mechanical.Electric Месяц назад
@@HVACRSurvival went back this evening and looked up some of your old videos on geo units and found where you showed your gauge setup. Where would I find the needle end to adapt to the test port?
@HVACRSurvival
@HVACRSurvival Месяц назад
@Brooks.Mechanical.Electric you can find it online if you search for geothermal suppliers I was able to get mine at my carrier supply house. Habegger Corporation is who we use.
@Boraxo
@Boraxo Месяц назад
That Jumper King is slick. 👍
@jimfurnell7657
@jimfurnell7657 Месяц назад
Awesome diagnosis' your trouble shooting skills really make me stop and rethink of my approach to low voltage issues. Sometimes they can drive a us techs crazy. Great informative videos, stay safe.
@HVACRSurvival
@HVACRSurvival Месяц назад
Thanks Jim!
@LilyRoseElectric
@LilyRoseElectric Месяц назад
Great job 👏 Killing it.... always the best
@user-bj3wj9oj6h
@user-bj3wj9oj6h Месяц назад
Thanks for your videos.
@HVACRSurvival
@HVACRSurvival Месяц назад
Glad you like them!
@wd8557
@wd8557 Месяц назад
Nice, I'll have to put this one down in my book.
@thesilentonevictor
@thesilentonevictor Месяц назад
Good troubleshooting Rick
@waynetirrell2358
@waynetirrell2358 Месяц назад
Great Video! I always looking forward to each one 👍
@HVACRSurvival
@HVACRSurvival Месяц назад
Glad you like them! Thanks!
@kenebler7855
@kenebler7855 Месяц назад
Awesome video thanks for going through everything like you did very helpful
@HVACRSurvival
@HVACRSurvival Месяц назад
No problem 👍
@maintenanceman1015
@maintenanceman1015 Месяц назад
Worked on AAON units where the control board controlled a bank of relays . If a contractor went bad it couldn`t take out the main board. But had the blower short cycle ,the relay would turn on the Frequency Drive then shut off . Was the coldest day in winter ,why not think was -10 ,just pulled the relay out and reinstalled it . Good to go , Got 3 back relays just in case , 13 AAON units at that location.
@helmsajr
@helmsajr Месяц назад
Great job Rick Lennox not my favorite unit to work on but you got it figure out.
@HVACRSurvival
@HVACRSurvival Месяц назад
Thanks 👍
@elBusDriverKC
@elBusDriverKC Месяц назад
On those prodigy units, they have a self test mode. Pulling the wires from the thermostat connections and putting it into self test can help get thermostat problems / thermostat wiring problems out of the picture. I've seen a few go bad here and there. At $750 - $1000 it's an expensive failure. Fun part is having to reprogram the new controller for all the fancy settings.
@Gcanno
@Gcanno Месяц назад
Thank you .
@HVACRSurvival
@HVACRSurvival Месяц назад
You bet! 👍
@joeyf504327
@joeyf504327 Месяц назад
it's probably a failed capacitor on the controller that is there to supply current during DC power draws for the computer when activating the 24VAC control relays. I have seen this happen in printers. They get stuck constantly rebooting because a capacitor fails and can't provide current during startup when there is a momentary power draw. New cap and good to go.
@HVACRSurvival
@HVACRSurvival Месяц назад
Lennox guy said there’s a relay that fails?
@danpresson
@danpresson Месяц назад
Awesome video
@HVACRSurvival
@HVACRSurvival Месяц назад
Glad you enjoyed it !
@kingwookie7210
@kingwookie7210 Месяц назад
lennox one of my least favorite over engineered RTU's, good work as always.
@HVACRSurvival
@HVACRSurvival Месяц назад
Same here!
@terrygrant8126
@terrygrant8126 Месяц назад
You did good friend!....
@HVACRSurvival
@HVACRSurvival Месяц назад
Thank you!
@Brooks.Mechanical.Electric
@Brooks.Mechanical.Electric Месяц назад
Hey Rick, another great video as always. I've been spending every spare minute i can, which isn't much time these days cramming in all the knowledge I can on the newer equipment we're see on a more day to day basis and one thing I'm having to study up on is geo water sourced units, and ive been doing a ton of inverter type heat pump systems. I know you have a few videos I've watched on the geo / water source systems and was wondering if you have any recommendations for a good pressure gauge for checking out the water loop? Not a ton of info online that ive seen and I thought of you as a good person to ask. Take care my friend and thanks for any suggestions you have!
@HVACRSurvival
@HVACRSurvival Месяц назад
I use an old refrigeration gauge. R22 type, I drilled the restrictor plate at the bottom. It works great
@Brooks.Mechanical.Electric
@Brooks.Mechanical.Electric Месяц назад
@@HVACRSurvival awesome, thanks for the info.
@davidpetetsen3744
@davidpetetsen3744 Месяц назад
Nice video I had same issues with lennox 25 ton rtu just like that
@HVACRSurvival
@HVACRSurvival Месяц назад
Good to know I’m not alone
@DanielGaytan-vl9hw
@DanielGaytan-vl9hw Месяц назад
The board has a limit on the incoming voltage, any voltage higher that 27v Ac will cause it to lock out or act like that. You need to change the primary voltage tap on the T1 and T18 transformer to lower the secondary voltage.
@HVACRSurvival
@HVACRSurvival Месяц назад
You would think Lennox tech services would have said something about that. He did tell me that there’s a relay inside the control that has a history of failing. 🤷‍♂️
@MariosACandRefrigeration
@MariosACandRefrigeration Месяц назад
It could have been a sensor or some other thing,unplug everything and reconnect until it shows a problem to isolate,also you can switch 24 volt on transformers in case that one is weak.thanks for sharing.
@knockitofff
@knockitofff Месяц назад
0:34 that's a sheave LOL
@HVACRSurvival
@HVACRSurvival Месяц назад
Whatever🤫 you knew what I meant. 😆
@jamesashley3827
@jamesashley3827 Месяц назад
Thanks
@HVACRSurvival
@HVACRSurvival Месяц назад
Your welcome!
@MegaDesna
@MegaDesna Месяц назад
ALARM 82: Means don't worrey "boutit xD XDD
@HVACRSurvival
@HVACRSurvival Месяц назад
😅
@rjeepster8640
@rjeepster8640 Месяц назад
I would start by putting a thermostat right to the controller to find out if downstairs is causing your issue
@subcoolHVAC
@subcoolHVAC Месяц назад
Nice Troubleshooting , thankfully compressors were still good 👍
@HVACRSurvival
@HVACRSurvival Месяц назад
You got that right!
@Pippy626
@Pippy626 Месяц назад
I love the videos. If you ever need help with editing I can assist. I wouldn’t mind a few longer videos too
@Eddy63
@Eddy63 Месяц назад
Nice troubleshooting as usual ... Are you & Chronic gonna do any more streaming ... They were always fun ... Thx
@HVACRSurvival
@HVACRSurvival Месяц назад
Eventually. Crazy busy lately
@EverythingHVACR
@EverythingHVACR Месяц назад
Saturation, Saturation, Saturation. Nicely done, Rick
@HVACRSurvival
@HVACRSurvival Месяц назад
Thanks Steve 👍👍
@AErefrigeration
@AErefrigeration Месяц назад
Give us a 3 hour video
@BlackAck90
@BlackAck90 Месяц назад
Still trying to find out where "AcrossT" comes from.
@xenories
@xenories Месяц назад
It looks like something low voltage is shorted and when it wants to turn on it shorts main transformer, the proper diagnostic whould be to unplug everything from the board and connect slowly thing back until it trips. Or just chech resistance on everything low voltage. I dont think its the main board.
@HVACRSurvival
@HVACRSurvival Месяц назад
Well, like I said, I talked to Lennox tech-support and they said it was the board. Because what I unplugged was all the outputs. Also, if it was a short, the amperage would’ve went up on the transformer. I eliminated that even as a possibility by putting the amp meter on there.
@ceilingfanmusic6597
@ceilingfanmusic6597 Месяц назад
So i have 2 hypophises as to whata going on with that controll bored. 1: the filter caps on the voltage ragulation circut is going out causing the MCU to be unstable to the point that any change on the power rales causes the MCU to reset. 2 one of the relays on the controller has a shorted coil ( the y1 relay) and when the controller trys energyzing the relay it pulls down the supply dc voltage for the controll bored and causes it to restart. Pardon my bad spelling
@HVACRSurvival
@HVACRSurvival Месяц назад
Lennox tech service told me that there’s a relay inside there that has gone bad so you might be correct
@MariosACandRefrigeration
@MariosACandRefrigeration Месяц назад
1 pound of extra refrigerant will make those microchanel trip.
@halverde6373
@halverde6373 Месяц назад
Everyday nightmares every service tech is forced to contend with. How much would you be willing to pay anyone to handle that?😰💰🤣
@HermesVintage
@HermesVintage Месяц назад
Any updates on this service call? If the board solved the issue
@HVACRSurvival
@HVACRSurvival Месяц назад
It just happen Thursday. The store has a HVAC crew that put on a different series controller and it attest has one stage of cooling until the correct board comes in.
@MrJujubean
@MrJujubean Месяц назад
Great trouble shooting video. You outta here controller lol
@brianjones5935
@brianjones5935 Месяц назад
ya let me just rip into the insulation lol
@himrfreeze
@himrfreeze Месяц назад
In the service mode u can test. Run each compressor and if you jump have to do y g and r and if summer u can leave compressor on in service mode sometime even with faulty board
@HVACRSurvival
@HVACRSurvival Месяц назад
I need more time with that board. I haven’t had a chance to work with it much.
@halverde6373
@halverde6373 Месяц назад
The actual problem is it's a Lennox. Similar to Trane. God help all of us that fight against chaos. Glad I made it out alive to retirement. Fond memories but I don't miss it.
@CM-ou4zr
@CM-ou4zr Месяц назад
Wow that's a bad diagnosis from the guy before you. Shorted compressor? What are they smoking in ohio rick
@HVACRSurvival
@HVACRSurvival Месяц назад
They diagnosed that on another unit not that one. I just misread it but the way they wrote the description kind of sucked, but since they’ll probably watch the video, I have to be careful what I say.🤣
@johnwalker890
@johnwalker890 Месяц назад
Good job Rick, Ghost controller issues is what I call it, I wasn't sure what happened to you?? I thought you were in You Tube jail?? Just kidding, God forbid......
@HVACRSurvival
@HVACRSurvival Месяц назад
Nope. I mentioned it at the end. Stupid busy and I’m on call
@johnwalker890
@johnwalker890 Месяц назад
Well they got the right guy for it....
@steveblake8766
@steveblake8766 Месяц назад
253 thumbs up
@MariosACandRefrigeration
@MariosACandRefrigeration Месяц назад
hello Rick.
@HVACRSurvival
@HVACRSurvival Месяц назад
What’s up!✌️
@thefathvacguy6341
@thefathvacguy6341 Месяц назад
Trane or Lennox....which do I hate more....hmmmm
@HVACRSurvival
@HVACRSurvival Месяц назад
🤔🤔🤔🤔 the correct answer is…. Both.😅
@thefathvacguy6341
@thefathvacguy6341 Месяц назад
@@HVACRSurvival Very true!!! 🤣🤣🤣
@tysonrojas5477
@tysonrojas5477 Месяц назад
Could of megged out compressors and saved time
@HVACRSurvival
@HVACRSurvival Месяц назад
Yeah, but unless you have a log of what you’ve had in the past, it’s a well-known fact that you can’t just go up there and make a definite guaranteed diagnosis unless it’s really bad short and you can see the super low resistance and the test voltage actually drops. You can have moisture in the system or liquid lane in the compressor and that will give you a low mega meter reading.
@mitchelljohnston754
@mitchelljohnston754 Месяц назад
This happened to me, it was one if the 3 fuses
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