Air Handler Fan Delay Board! Explained & Tested!
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- Опубліковано 17 жов 2024
- In this HVAC Training Video, I show How the Fan Delay Control Board Works and How to Troubleshoot it! This Control Board is Commonly Found in Air Handlers used for Air Conditioning and Heat Pumps! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #airhandler #explaination #relay #delayboard #trainingboard #electrical #circuit #circuitboard
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Sorry to be so off topic but does anyone know a tool to get back into an instagram account..?
I was stupid forgot the password. I love any tips you can give me
@Rodney Julian instablaster =)
@Steven Callen Thanks so much for your reply. I got to the site through google and Im in the hacking process atm.
Seems to take a while so I will get back to you later with my results.
@Steven Callen It did the trick and I actually got access to my account again. I am so happy:D
Thanks so much, you really help me out!
@Rodney Julian glad I could help =)
Very good explanation. I would mention that some systems don’t use a fan delay board. If the blower motor is an X13, the motor can be programmed to provide an ON and OFF delay therefore eliminating the need for the board.
OL is open loop which means it's more then the meter can measure, still could be a "high reading" but it generally means open connection especially for continuity. Some contacts can show open thru meter but when any higher current goes thru like a test light it may partially or fully close under a load. In those situations it's best to measure across contact for voltage drop while under load, there should be none with a good contact. Great breakdown as always.
Excellent explanation and THANK YOU for the tutorial.
Glad you enjoyed it!
Look... I have this crazy situation that I will maybe make a video on.. but you sir! I have some knowledge of electronics.. because of your videos and some schematics of my air handler... has given me the confidence and opened me up to a world I didn't know I would love. As old as I am I want to go into the HVAC field. Thank you.
im a maintenance tech for an apartment complex built in 2014. goodmans all over the property. all units use this exact control board. the relay box on the boards are catching on fire. in 2 years ive replaced almost 30 boards. our complex has only 214 apartments . i have pics, model numbers and serial numbers of some . goodman is not answering me about the issue. did i miss a recall? surely this isnt normal
I love your videos on the electric side of things. Thank you.
Thanks for watching!
my trane 4tec3f42c1000aa didn't come with a fan delay board. the fan is either on or off when either the cooling or heat cycle is started or stops. Can a delay board be added?
Great presentation. Can you explain what’s the other side connected to for NO and NC, and how it work, that will be more clear for the explanation
Thank you for update to me, I have question from other videos when I recharge after recovered the whole liquid when go to compresser it not damage the compress?
I googled what XFMR on your board stands for and found this "XFMR is short for transformer," Just thought it was interesting. Thanks for another enlightening video. So great your happy to share your knowledge.
Absolutely, did you see today's video with the wiring diagram and the xfmr?
@@acservicetechchannel watching it now. Thanks again.
Awesome video and very thorough explanation! Quick and easy troubleshoot
Thanks for watching!
I just learned the same similar things this year of 2022 so keep that guiding going because it's actually helping people in the world but most of them playing quiet.#GreatJob! 😷👍
When you are testing the relay to see if it opens and closes. Do you check it when its getting voltage in order to see if it open or closes. I know when you check for resistance you are suppose to have the power off.
Thanks for sharing. I enjoy watching your video.
Thanks for watching!
Good day Craig. Do you work with VRF systems?
if you do, it would be great if someone would nake video about wiring controls.
hiw to connect indoor units with outdoor units. master, slave etc.
maybe about adressing.
i struggle to find quality tutorial on that specific topic.
cheers
👍 once again clear and concise troubleshooting. On point !
Do you still work in HVAC contracting field or do you devote all your time to your channel which is excellent .
Also kudos to the your library of books 📚 on your site . I plan to purchase soon .
I am just building our HVACR educational company presently and doing guest teaching at high schools and colleges as requested and able, thanks!!!
Thanks for the videos. What if the fuse is good and no power is coming out of the R? Reading Ooo.
The relay on the circuit board, is that one for the larger fan? I have a packaged heat pump system.
Thank you for this very well explained video…Another one bite to dust.
Are these fan control boards not used on natural gas furnaces? I have an old gas furnace fan control board (limit and valve control as well) that I'm looking to replace.
Just curious, is there a wiring schematic of the circuit board? U1 looks like it could be a 555 timer. The four diode in a row is the AC to DC rectifier and the caps and resistors set up the timing trigger delay. The 555 timer was the first IC I played with when I was in Tech school and college about 45 to 50 years ago. There was a very good book published about them and they are still used a lot for stuff like this. No use using a CPU when you can keep it simple and cheap.
Great explanation! Thanks for the information!
So the transformer can be checked from the circuit board at the XR and C terminals for 24 v AC?
My board started blowing fuses, the repairman took all the 24 volt wires that went to the thermostate off of the board and it still blew the fuse. He then replaced the board and it not longer blew the fuse. He said the board had gone bad, nothing looked burnt, what on the board could have gone to ground to cause the fuse to blow?????? thanks
Pretty neat explanation!
Thanks!
Great video Craig...👍
Glad you enjoyed it
Would a bad board or the relay on the board cause the t-stat to flicker?
testing XR and R is a quick way to test the fuse?
The relay control side is DC? While the load side is AC, should you be measuring in DC on the control side then? All while we have 24VAC from the XFMR for control voltage?
Why is it a DC coil they use. Is it because they need to work with DC to get time delays to work such as using capacitors
Your a beast bro keep doing you 🖤🖤🖤🫡🫡🫡🫡
I’m not sure if I have a delay board, but last time service person came, they adjusted such that there was a much longer delay than 7s before fan came on. I think it was set my internal temperature somehow. It seems the delay is too long, the furnace overheats and shuts off even before the fan starts. Any suggestions on what I should look for to adjust back to better operation? My workaround currently is just to leave the fan set to on rather than auto. Thanks.
Hi Craig do you video on heat pump? How the control board operates on the condensing unit?
look up "acservicetech defrost board" thanks!
That thing came out of a Goodman Airhandler and usually you don’t even need a meter because it will just be a chard remnants of a PC Board, and while you’re there changing it go ahead a install a new evaporator if it’s not leaking now it will be. Can you tell my love for Goodman.
Hello
Are you saying that one wire has 24 volts?
Really enjoyed
Wow. Super helpful video.
Thank you very profecional explained, you ar a profesional
I have the same board. But the fuse is blowing. What can it be? I'm getting 27vac from the transformer. Should I change the whole board? Thank u.
Low voltage short, one of the low voltage wires are either touching metal, touching each other, or you could have a bad contactor at your condenser. Could possibly be the thermostat as well if something is bad inside it. Hope that helps 👍
I think somebody weedwhacked your tstat wire near outside unit.
I have Haier air handlers which have the worst control boards. They fail all the time. One time we had a power outage and two of them failed and had to be replaced. I always have to replace them frequently. I also have Goodman and carrier which never give me any trouble.These Haier control boards don't have a fuse built in them.These are very basic control boards. They have 6 wires connected to them. I m wondering if I can replace them with a diffrent brand that has a built in fuse like the one in this video. Haier control board part#WJ26X24063.Thank you
How to bypass the 90 second fan delay to reduce humidity in the summer?
Hello from ole NC👍
Hello there!
Thank you for your video
So nice of you
I need a fan delay board for an old school AC system, 120 volt capacitor start fan motor, for my residence. My transformer works, the output fan relay burnt up.
Looks like what you have here would work. Can I get the manufacturer/ part number? My apologies if you have listed it.
Hey John, don't know if you got a board yet but the part # for the board he used in the video is Part # PCBFM103S Good luck on fixing your system. 🛠️
@@ApartmentMaintenance
Hey thanks!
I managed to patch a simple controller together with a relay and my existing t-stat. Still working with only a couple more cooling months ahead down here in FLA.
I'll check out that board come "winter."
Thanks again.
@@johntrauger68 No problem!
Emerson 57T01-843 Blower Time Delay Relay I have this board as replacement in my Tra=ne air handler, doe sit matter which wires go where on the relay. I have one huge red wire and one small red wire.
Thanks!
Thanks so much!! I really appreciate it!!
Thank you 🙏🏽
You are so welcome
Awesome job thank you so much
Thanks
Where in the book I can find this 😮
So the black relay is 120 volts on one side. Then the green is what makes it kick in.
even ifi its low voltage why did you measure the relay using resistance when power to g was on? why not just measure voltage for you know
I have a board that looks just like this, but mine doesn’t have a fuse located anywhere. I can figure this out. I have power going to the board but I have no power on my Tstat wires.
This is my board but mine is not equipped with a fuse. The location is present but there are no terminals to install a fuse into 🤦🏼♂️😭. There is a red wire connected to XFMR-R terminal but it has to be useless since the circuit dead ends without a fuse. Please help
Same board Goodman uses
Since there is alternating currents and direct currents involved with these boards can you please hook up an oscilloscope plus a volt ohm meter while testing these units just as in a school lab or any other electrical , electronic lab!
Hook up oscilloscope!
Hi, I have the same control board in my central climatisation and heating unit. I have an issue that seem to come back at each 4-5 years or so. The issue only happen on climatisation mode. Once the thermostat reach the desired temperature, the fan stop correctly about 60 sec later ( wich is normal) but the outside compressor never stop, even if I put the thermostat to off. I have to close the breaker in my electricity panel to make it stop. Once I reopen the breaker, the unit can work properly for 24-48 hours before doing the same problem. The relay in the outside compressor is new and is working ok. A tech came to check and the only thing he found to solve the problem is to change the Fan board. After that, all worked ok for about 4 years then the same problem happened again. So I changed the board again. Now, we are about 4-5 yr later and the same problem is there again. Does anyone knows what in this board can cause this issue at each 4 or 5 years or so???
Super
So nice
XFMR is an abbreviation for transformer.
What is the point of a 7 second delay before the fan turns on ?
Mostly to reduce the line surge.
👍
Timer board
My understanding is 24vac is ac. Not dc.. so wouldn’t that make that relay ac powered ? There is no rectifier on that board or in that transformer
The four diodes between the power resistor and gumdrop capacitor near the R and C terminals are formed into a discrete diode full bridge rectifier. From their the chip and the relay control side use this 24v DC rail to draw their power. This also enables the use of the simple to drive transistor (at the inboard corner of the relay) to switch the relay coil by a signal from the chip.
@@jkbrown5496 thank you!!!!
Looks like a couple of zener diodes there to stabilize the dc voltage.@@jkbrown5496
WHY DONT YOU HAVE YOUR VIDEOS FOR US BEGINNERS. FROM THE BEGINNING TO THE END WHY ARE THE VIDEOS ALL MIXED UP. SO AS U TALK ABOUT ONE THING IM CONSTANTLY GOING BACK TO FIND OUT WHAT YOUR TAKING ABOUT BE CAUSE I NEVER HEARD A CERTAIN TERM FOR A COMPONENT?? ANY HELP. WHICH. VIDEOS SHOULD NEWBIES START WITH ???? FRIM YOUR PLAYLIST???
So if my basic Emerson control board on the Rheem 5 ton unit has no onboard relays, and does have an X13 motor, what would cause the fan to continue running even after the call for air stops? I know it's supposed to run 45 seconds or so to clear the ducts but it just keeps running thus making the house seem more humid after a bit. I can remove the G and R from the thermostat itself and it keeps running until I turn the breaker off. Old board is part number 47-102077-03 and the new, smaller, version is 47-100436-07.
Im having a issue with the R 5 resister not sending power tried 2 other board
One side get 24v but other side of resister nothing