Troubleshooting A Blower Control Circuit Board From Goodman Air Handler
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- čas přidán 12. 09. 2024
- A link to pt.1 of troubleshooting a blower control board,
• Going Over A Blower Co...
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Keywords: how to troubleshoot a blower control board, Hvac training videos, Hvac training, troubleshooting a blower control board, Blower motor troubleshooting, Goodman A/C unit troubleshooting, Goodman AC unit, Goodman blower board troubleshooting, Goodman air handler blower board, Blower board troubleshooting, How to fix Goodman A/C unit, apartment maintenance training videos, apartment maintenance, apartment maintenance technician, air handler circuit board troubleshooting, how to fix air conditioner, air conditioner repair videos, property maintenance, property management
If you'd like to support the channel, you can do so by shopping for tools or whatever you need on AMAZON through this link,
amzn.to/2tjWvN0
This page contains affiliate links, which means that if you click on the link and make a purchase, I’ll receive a small commission. Lex Vance is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon .com
Great video, however, you’ll need to put the fuse in for continuity. You were testing with the fuse out, you won’t get continuity between xfr and R without the fuse in place….oops.
Lex you are an excellent instructor. Thank you for your expertise on the blower control board.
Thank you so much for watching Carl!
Just ran a call behind another tech that couldn't figure out what was going on. Got there and the customer had been trying different thermostats in hopes of her heat working while leaving the breaker turned on throughout. Well it turns out she backfed voltage to the blower control board. It was no longer outputting voltage to the fan. Chalk this up to a customer thinking they know best. Heating and air conditioning is a luxury and people seem to forget we are there to help. Thanks for sharing the helpful video for all those crappy goodman units needing fixing!
👍😆👍 Sounds like you're making memories. Thank you so much for watching Michael!
I woke up to my evaporator coil frozen over with the compressor still running. Turned the fan from auto to on but blower motor still wouldn’t run. Followed your troubleshooting procedures and tested the relay on the board and didn’t get proper voltage. Bought a new board, installed, and now all is well again! Thank you so much!
Awesome! Enjoy that $500 you saved by not having to call a repairman. 👍😂👍 Thank you so much for watching pilotgeorge!
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You da bomb Skid! Keep them coming. Always a pleasure to watch and hear your commentary. You really should teach on the side! Thanks man
Shane Palmer Thank you so much for watching Shane!
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Thank you Lex! It's because of your great video that I figured out what was wrong with my unit.
Fantastic! I love hearing that. Thank you so much for watching Andrew!
Thank you. Its really nice that some people are happy to share their knowledge.
Michael Costello Thank you so much for watching Michael!
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This man knows his stuff! He's smart and I know what I'm talking about.
Thank you so much for watching Wiser!
@@LexVance you're most welcome my friend.
Man oh man simple video but well explained....you the best 👍👍👍👍👍👍👍 Keep videos coming!
Thank you so much for watching Jesus!
@@LexVance That Jesus part caught me off guard 😳👍 I was like Christ, no Hesus 🤣 but with a J
thank you just learning student after high school id took a course AC Tech and your video refresh my mind out in the field your the greatest teacher thank so much and awesome video
Thank you so much for watching Ivan!
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Lex The EBTDR board you showed very well may have been bad,but it would not have powered the R or showed Continuity from XFMR R TO R when the fuse is missing or bad. Test remove fuse from good one and try you will see what I mean. Good day brother.
You're right! Thank you so much for watching Robert!
Like your videos u do a good job.
u need fuse in Board also to get continuity between transformer 24 & 24 terminals on the board
Jimmy Padgett Yea You're right. I was getting no continuity there with a good fuse in it on that bad board as well. Someone wired up a transformer backwards. He had 240v on the 24v side & 24v on the 240v side. The fuse blew of course. I came to help out and put a new fuse in. There was no continuity between XFMR & R with the new fuse. I should've put a dang good fuse in it during video. It got pulled out because it was still good & we didn't want it thrown out with the bad board. Thank you so much for watching Jimmy!
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lot of good points in this video, I was always wondering what does skid mean?
Capitol Refrigeration,Heating,and Cooling Thank you man! Skid is a name my cousin called my uncle because he was a racecar driver. Like skid tire marks on a race track. I'm kicking myself for not having a good fuse in that bad board. I was getting no continuity there with a good fuse in it on the bad board as well. Someone wired up a transformer backwards. He had 240v on the 24v side & 24v on the 240v side. The fuse blew of course. I came to help out and put a new fuse in. There was no continuity between XFMR & R with the new fuse. I should've put a dang good fuse in it during video. It got pulled out because it was still good & we didn't want it thrown out with the bad board. Thank you so much for watching Capitol Refrigeration!
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There are shops that do component-level pcb repair of furnace and ac controller boards that save money. I will probably lease a shop soon to repair boards
Right on! Thank you so much for watching!
excellent I'm hooked on your fantastic work! I drive over the road im 48 I wanna learn the HVAC trade thank you for sharing!.
Right on! Thank you so much for watching jimbola!
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Thanks man I troubleshooting a goodman blower unit in attic. Bad blower relay.
I got correct power 240v & 24v.
I jump lead com and normally open blow kick on. So found the bad board
Awesome! Nice fix man!
Thank you so much for watching Xavier!
Nicely done Lex! Thanks man!🤓🤙
Paul Peck Thank you so much for watching Paul!
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THANKS DUDE YOU HELPED ME OUT ALOT
Thank you so much for watching Bernard!
Thanks for share
Thank you so much for watching!
Great video, really helped me out!!
Awesome! Thank you so much for watching Dru!
Thank you for sharing your knowledge!!!
Blessing and more blessings to you and your family in Jesus name Amen 🙏❤️🙏❤️
Thank you so much for watching!
@@LexVance I'm out of Fort Worth Texas 🤠
and it's hot 🥵 . I replaced the contactor and capacitor and the blown fuse . Tested the transformer it was good as well as the other parts. But you showed me exactly how to check the control circuit board and I had to take time to say Thank you for sharing that blessing with me and my wife and two dogs. I'm a retired truck driver and funds are low but God's grace and mercy!!! 🙏👍
Good job, Lex 👍
Jim Zeidler Thank you so much for watching Jim!
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You're welcome, Lex 🤠
please do more of these board videos thanks
Thank you so much for watching PBS!
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Great video Lex!! Do you have any videos on recovery and or charging a system?
Danny L I do. They're a couple of years old. Just type my name & charging Freon in search box. Thank you so much for watching Danny!
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Man you know your stuff
Jeff Venable Thank you so much for watching Jeff!
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Great video Skid!
Familia Sanchez HVAC Thank you so much for watching Famila Sanchez!
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does goodman recommend cleaning their coils with acid cleaners ? reason for asking is in hvac school long ago i was told to use alkaline cleaners only on alluminium , no acid ,,,,,and is the sequence of operation explained in the wiring diagrams on a goodman ? ,,,thank you nice vids ,,,,,,i am retired but like to keep learning always ,,,,,
I use only alkaline as recommended. Thank you so much for watching bug den!
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Like your videos on the in depth explanations, and not trying to be a bad skid, but your XFMR to R won’t have continuity without a fuse, the power goes to XFMR to the fuse and back to R. Rewatched your first vid to make sure if you mentioned that, and you had just mentioned it was out, not how the power ran through it. More or less, I think you know this, but it wasn't conveyed in either video, which may cause a new skid to think a board is bad if the fuse was blown.
tcpHVAC/R Yea You're right. I was getting no continuity there with a good fuse in it on that bad board as well. Someone wired up a transformer backwards. He had 240v on the 24v side & 24v on the 240v side. The fuse blew of course. I came to help out and put a new fuse in. There was no continuity between XFMR & R with the new fuse. I should've put a dang good fuse in it during video. It got pulled out because it was still good & we didn't want it thrown out with the bad board. Thank you so much for watching Tcp!
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Very helpful video. My fan board control got damaged a few days ago. My furnace was not turning off and I had to power it off. I found out when I open the unit and saw the board burnt from that black square relay open and close terminals. Those two cables were really bad. I just order a new one and I hope this helps my issue. I would like to know if is it possible that there might be any other problem in the system that cause this to get damaged. Thank you so much if you have any suggestions I would appreciate.
Hard to tell by not being there. Wires burn sometimes though. Just strip off the burned part and put them on the new board. I've done that and had no issues.
Did you find other problems? I have the same problem- the board burnt from the black square relay.
What is the voltage between R and G on the board? 24V ? Or none? Thank You for sharing your Knowledge with us god blessed you
Yep 24v. Thank you so much for watching Ramon!
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If It’s none means that I have to replace the board...?
Thanks for the info brother
I hope you can help me as no one seems to know what my problem is...I’m having trouble with my heat not wanting to turn off at set temp at the themostat. If I set it @ 75 degrees it might shut off at 75 or shut off at 76, 78 etc or not shut off period. I can’t shut it off at the themostat, I have to shut it off at the breaker. I’ve replaced the themostat, put a new air filter, checked the wires coming from the themostat to make no wires are touching to create a short. My only thoughts is maybe a bad heat sequencer or a bad control board...what is your thoughts?
Stuck sequencer? 🤔 I'd need to be there for this head scratcher.
So does a thermostat hook up to that board? Or is there a different main board? Now I want to see the whole setup and how it differs from northern furnace type hvacs
jason Yep, it comes out of the R terminal & down to the field wires. Thank you so much for watching Jason!
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have you ever had a short on the control board ? popping the 5 amp fuse.
No, not yet. But it's possible. Those are tricky. Thank you so much for watching Eric!
Your so called "Defective Board" is missing the fuse ... !
Yep, I wish I would've left it in. Co-worker took it out. It still didnt work with good fuse in it I swear!
👍😂👍Thank you so much for watching Coil!
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😉👍🏻thanks for sharing a great video
Thank you so much for watching Fernando!
I have a Goodman heater, the blower motor will run then shut off then start back up. Do you think the relay on the board can cause this? Thanks!
Hmmm, if the outside unit shuts off too then you may be low on Freon. Units have low pressure switches that will shut the unit off to protect the compressor. I very rarely see a unit shut off & on due to the relay. I'm not ruling it out. But most common problem with shutting off & on is low Freon. Or, there could be a short on the white wire (Auxiliary heat wire) that goes out to the outdoor unit. You can pull that wire out of the tstat & leave it out to see. If you've got a heat pump, the heat will still work after you pull the wire out. This is a tough one & I'd need to be there with my volt meter to see what's going on. Thank you so much for watching Dean!
What’s normally connected to the NC terminal? Thank you
It's usually a high voltage brown wire coming off the sequencer. Could be different for slightly different models though.
Ugh. Goodman...good video!
bababooey7576 👍😂👍 Goodman, selling job security everyday. Thank you so much for watching Bababooey!
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Lex Vance Anytime!
Ty
You're welcome! Thank you so much for watching!
Love the video thanks for sharing have a question if you don't mind what if my control board fuse keeps blowing out? I checked the thermostat wires nothing contacting, checked outside condenser to make sure no bugs got stuck in any wiring and nothing. Not sure why fuses keep blowing wondering if you can help me with this thank you!
Take wires out of thermostat & connect red & green. Indoor fan should turn on. Then start adding wires until it blows. Whatever wire it was, change it. Should have extra wires in string. Thank you so much for watching Giovannie!
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Use a wire nut & wire nit them together. Adding a wire one by ine until you find which one is blowing it.
thanks again you are the best
Thank you so much for watching PBS!
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Great video.. Question please.. my AC unit is working fine but when I turn it off from the thermostat(old round analog mercury) , the blower will fast switch between off and on intermittently for long time till its finally off.. since this problem I'm forced to turn it off every time from the main breaker.. what do u think? is it the thermostat or the control circuit board? how to diagnose the case? thanks
Turn the power off & pull all the tstat wires out & turn the power back on. See if the fan does it then. If it does, then it's a bad tstat. It's hard to diagnose from not being there. Thank you so much for watching myplay!
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Why would you have 240 volts at the two terminals you said should have 240....The switch is breaking only one side of the line....In the common and out the normally open or the normally closed depending on whether the relay is energized or not...It switches the line power, it doesn't use it.
I should've used high voltage instead. Just a habit saying 240. Thank you so much for watching Vern!
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Thank you master
Thank you so much for watching Juan!
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Thanks a million time
Thank you so much for watching Mister T!
Lex Vance thanks to your video I feel confident to bypass the fan relay by connecting the COM with the NC. This way I can still use my board - that fried at the NC level - after I have changed both sequencers (that must have caused the board to fry in the first place). Two cascading problems that I was able to understand, thanks to you - so I avoided having a contractor- in this special pandemic situation. Guys like you make the world a better place
I know this is an old video but still have a question. My blower stays on even with the thermostat removed. Through some voltage checks I found that the heater sequencer stays energized. This is in the cooling mode. Can a sequencer stick shut?
Bad sequencer. Replace it.
Thank you so much for watching Frakes!
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Will the board make the heat strips run all the time in ac or heat ?
Yes, if the heat strips are stuck on, it will make it run all the time. It's a safety measure to keep air blowing over the hot coils so you dont burn the house down. Sometimes the switch will weld shut & make the fan run all the time too. Thank you so much for watching Patrick!
My biggest issue here in Ky is defrost boards. Got any info on them? Anything would be greatly appreciated.
Keith Howard Will do Keith!
Thank you so much for watching !
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What if ur getting 11volts instead of 24 coming out the transformer
Might have a bad transformer. You need 24 volts.
I have the same board. my blower fan only comes on when i connect the green to red at the thermostat. when i connect only yellow to red, the compressor comes on outside, but the blower fan does not come on. What can be the cause of this scenario?
You may have a bad thermostat. I'd need to be there with my volt meter. If everything works out of the thermostat then my guess is a bad thermostat. 🤞 Thank you so much for watching David!
Hey Lex, I have a heat pump that works fine when I set it to auto and cool but as soon as I put the heater on, I don’t get any 24V to the contactor. What do you think the issue may be?
Could be the thermostat. Wire nut the red, green, & yellow tstat wires together. If everything comes on & is blowing hot air, then you have a bad tstat. Thank you so much for watching Abraham!
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I have a question my air handler is a goodman and the circuit board fuse in the air handler blow up then when I put a new fuse it blow up again when I turn on power in the air handler what can cause that every fuse blow up it could b the board that is bad or could b something else
You've got a low voltage short. Make sure your contactor in the condenser is good.
If it is, Pull all the wires out of the thermostat. Then wire nut red & green together. Your indoor fan will turn on. Then shut power off & put in another wire. Turn power back on. Keep adding a wire until it blows. Whatever wire you added when it blew, that's the bad wire. You should have other wires not being used you can substitute. You have to hook it up in the air handler & outside in the condenser too though.
I have a low voltage short video on my channel where a fuse keeps blowing & I Show the repair.
Thank you so much for watching Angel!
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So I found that my blower wasn’t running on and the heating element was , I replaced the board and it worked. What was the problem on the board?
Sounds like the switch wasn't closing to close the circuit for the fan to come on. N.O. & C have to close for the fan to come on. N.O. stands for normally open. Thank you so much for watching Godfather!
Can u go over a defrost board on a Goodman condenser?
Sure can. I've got a couple of defrost tricks videos. Thank you so much for watching Anthony!
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could you please tell me where is the sequencer to connect in the normally closed relay?
Fado Portugues On a Goodman unit, a red wire off the top of the sequencer goes into normally open, and a brown wire off the top of the relay goes into the normally closed. Thank you so much for watching Fado!
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the old board you did it without the fuse and the new one with it , that's why it beaps
You're right. I wish I would've left the good fuse in. I still didn't beep. It was a bad board. Thank you so much for watching Juan!
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I've been watching video after video trying to find one that matches my problem.my sin was working fine two weeks ago, and then it went out.call somebody out, and they charged me $79 to tell me they're going to charge me $450 to run new thermostat wiring. So I did it my self. Just to find out that the transformers bad. So I waited a week and half Ford to come in the mail, finally
My control board had power and was working I had 24 volts,flip the system on, everything seemed great, I heard the compressor kick on the blower kick on, and then disaster, it was only blowing hot air. So I thought it needed a charge. Hired somebody else, who came out charge me $79 just to tell me it doesn't need any charge, it's full and there doesn't seem to be Elise, so I asked him what's the problem then, he couldn't tell me. I had one more person to come out and look at it, they couldn't figure it out either, in fact they suggested I just replace the entire system at a cost of over 5k. Thanks now I'm left in the heat cause no one can seem to figure out what's going on
@@shadowdemon7770 Oh no! Sounds like a head scratcher I'd need to be there for. I'd unhook the heating wires on the t-stat which is usually white and brown and see if blows cold. Just pull white and brown out or whatever your heat wires are. Pull them out of t-stat terminals and leave them out.
@@LexVance thank you for your reply, it was a pain to hand over $79 to two different hvac technicians just to be told they don't know. To your suggestion, I don't have heat, it's a roof top AC only unit :(
Like you video thanks Me gusta tu video gracias
Elmer Gutierrez De nada. !Gracias para mirando Elmer!
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what is the voltage from nc to c?? is it also 240 V ??
Yes that's high voltage on there. The R C & G terminals on the left side are 24v low voltage. Thank you so much for watching PBS!
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How about the g terminal ?
Green for fan. Thank you so much for watching Cools!
@@LexVance I m not getting 24 v on G?
I think i going to change out the thermostat wires.
Ok. Help me grasp this concept......
Our PCB board circuits had welded shut so that means our blower always ran. I'm in florida so after blowing cool air it just blew hot humid air and reheated the house quickly. So after watching a Lex video I realized I needed to check this board. VOILA! THAT WAS THE ISSUE. Here's the odd part ; not only did this fix the blower issue my air blows way colder.
I had been using a digital thermometer the past month at the vents just to get an idea of what it blows. It was around 60 to 65 degrees. Not great but it's hot so I assumed it was doing the best it could
After changing this board it is blowing 49 degrees at the vent.
I guess i cant figure out how the blower really impacts the type of air if the compressor was running before anyway.
What am i missing? My house is freezing now! Woo hoo
Sometimes you just work the unexplainable ghost out of the system.
👍😅👍 Thank you so much for watching C!
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@@LexVance you know.....that answer is going to bug the shit out of me. Haha. It's like when you shut off the radio but you were singing and didnt resolve the melody yet.
How did you get your EPA certification?
Colten Millard The company I worked with 13 years ago sent me to the class & I passed. I got my universal card. Thank you so much for watching Colton!
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I bought and read the ESCO book on a Kindle for maybe $14 at most. Then I studied ALL of the EPA 608 material on Mainstream Engineering's website; that was free. Then took some practice tests that I found online. After that, I called around and went to a Johnstone Supply and paid for the test. They mailed it in and shortly there after, I got a letter in the mail for a 608 Universal. In the grand scheme of things the difficulty level is 3 out of 10. The hardest thing is memorizing a few different dates when legislation passed banning the release of Freon as if it matters that it was some time in 1995. You have to memorize a few different vacuum levels you must meet for proper recovery, know about the leak rates for comfort cooling, industrial, etc. Need to know the difference between small systems, high-pressure, and low-pressure; since, there are really three tests after the basic environmental portion. You must know the difference between CFCs, HCFCs, HFCs, which have a chlorine atom, how much ozone it destroys what an Ozone Depletion Potential is vs a Global Warming Potential, etc. Again, none of it is hard. Have to be able to read a PT chart...
What if I measure two legs, I dont have 240V. I measured one leg to the grounded chassis. I got 110V. Another leg and chassis, 110V. But I measured both legs together. They don't show 240V. what is the issue here?
The 110V power comes from one leg of the breaker of the heating element. I measured one leg of breaker and the chassis. It showed 110V. Another leg of the breaker and chassis. 110V. Both leg of the breaker, 0V. Top side of the breaker, power sound from main panel. Both legs, 220V. What is the issue here?
Wei Mai Hmmm, if you've touched both legs of the breaker together & don't have 240v then try changing the breaker. Sounds like only one leg is powered. Thank you so much for watching Wei!
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Breaker both leg is powered. I measured one leg of breaker and the chassis. It showed 110V. Another leg of the breaker and chassis. 110V. I measure both leg of the breaker tho it shows 0V. Fan was on no heat. Now fan doesn't turn on anymore. Do you think that is transformer problem or heating element?
Wei Mai Hard to tell by not being there.
You didn't have a fuse in the bad board. Even the good one would have no continuity without the fuse
Thank you so much for watching!
The fuse was missing out of the bad board
K Mech Yep, I talked about that in the pt 1. Video. Thank you so much for watching K mech!
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Ok I missed that one lol . Good guide for the board. I usually pull them out and install a 90 series relay in place when I don't have a board available quickly.
K Mech Right on. I hear that's the best thing to do from the pros. These boards are catching fire! 👍😂👍
I was getting no continuity there with a good fuse in it on that bad board as well. Someone wired up a transformer backwards. He had 240v on the 24v side & 24v on the 240v side. The fuse blew of course. I came to help out and put a new fuse in. There was no continuity between XFMR & R with the new fuse. I should've put a dang good fuse in it during video. It got pulled out because it was still good & we didn't want it thrown out with the bad board. Thanks again man!
i've got that control board. my outside unit turns on and runs for about 2 minutes then kicks off but the air handler keeps running and the suction line gets hot. could i have a bad board?
Could be low on Freon. Your unit may have a low pressure switch & it's shutting off. Or, there could be a restriction & it's shutting off due to high pressure. I dont think its the board. Thank you so much for watching ucanbob!
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@@LexVance with the unit off i've got 115 psi on both sides. it won't run long enough to check it while running. could it be a bad thermostat?