mikie2501:


A quick easy way to trouble shoot most fan control boards to determine if the blower motor is working or if it is the control board

Tell us what you think!

Tags HVAC

24 Responses to “HVAC Blower not working, troubleshooting Fan Control board”

  1. evanssd1yt Says:

    I can’t believe you took the time to make this video and thank I was blessed enough to find it. A HVAC expert visited my house this weekend and for $100, mis-diagnosed the issue and wanted to charge $1000 more for the BS repairs. Also, not having the parts left me, a pregnant wife, and a 2 year old without AC in the heat. Using your method, I resolved MY OWN issue and can repair for $120. I can tell you that I don’t care one IOTA about the blower running until the part gets here. THANKS THANKS

  2. fyescas777 Says:

    You spelled ******* wrong, *******… By the way I an hvac tech, I just wanted to know other tech’s way of doing work. There might be a few with photographic memory out there. But like always, there one in a bunch who only feels tough enough to insult some one without knowing them. They only exist on line and you are one of them. You may answer back but what ever you say doesn’t matter because you just proved to be a *******.

  3. jmgeorge721 Says:

    its the kind of board you call a service company to fix or replace you cheap basterd

  4. mikie2501 Says:

    Very seldom have I done that. Like 2 times I think. usually if the board isn’t an exact replacment it’s kind of close. Usually you can sit outside in the comfort of your truck when you go back and sit in the cool air and read through the instructions, figure out changes that they want you to make, etc. The 2 times I have marked everything were on really old systems and the new boards were radically different and I had to change some wire lengths too. NO fun in a hot attic!!

  5. fyescas777 Says:

    When you replace this kind of boards do you label every single wire (in case you don’t have exact replacement)?

  6. infinityak Says:

    That was a rude way to state that!

  7. DethAng3l Says:

    Great video. HVAC RULES!

  8. brownparents Says:

    do i have to replace the whole board or some component, if the blower fan is not working?

  9. brownparents Says:

    how to replace the board?

  10. narutoghostrider Says:

    a nice video i had the same problem with my aunt’s control board the other day i did the same thing but i didnt had a three way conector so i only let the motor on until i went for the control board.

  11. armyace06 Says:

    thats what i was tough ..but you still have to check the motor…

  12. ufoarea52 Says:

    Hello, have you made a video? how can i rig up a relay? do you have wireing diagram how to set up relay?
    Also i jump R & G connectores to gether and fan turns on, but i am getting a hot air from A/C, does that mean relay or board is bad?

  13. alguerr1980 Says:

    Lame! Use a damn 5 dollar relay, it’s alot safer and can still be controlled by theG wire. duh! You ****.

  14. AdvCont Says:

    good ideas here with the doorswitch.

  15. mikie2501 Says:

    That’s been mentioned before and I’ve been meaning to do a demo video of that. Actually been meaning to rig up a ‘relay in a box’ with pigtails and all that I can reuse for just such a situation. On my round-to-it list! hehe

  16. abilahvac Says:

    nice demonstration I like the idea of wiring straight into the doorswitch, Ive never tried that one. As far as running the blower 24-7 how bout just putting on a temporary 24volt relay, that way it operates normally by thermostat.

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  18. mja0182 Says:

    cant you just for voltage, rather than doing the other stuff? then do what you did to get them going for awhile until you get the part? To me that is much easier and quicker. No power out of board, it’s straight forward, bad board.

  19. AirCoolCalifornia Says:

    pretty good video. Mickie!

  20. OcRefrigeration Says:

    Hey, Pretty cool idea on testing the motor by putting high on the door switch.
    I’m gonna use that if you don’t mind !
    i don’t know about leaving the fan run 24/7though. unless you told the customer how to turn it off. breaker or unplug it.? ok then.
    i Probably would of got a contactor off the truck and took the green wire to contactor coil.other to common. door switch to contactor. whala done. two screws into cabinet for temporary affixing of contactor.
    Pretty cool video!

  21. mikie2501 Says:

    Doh! Absolutely :)

  22. CarlLewenski Says:

    You disconnected the low speed wire from the board and tied it off to the side in case the customer were to turn their furnace on at some point.
    I see your reasoning behind this, but wouldn’t it have been just as safe to of placed the low speed wire on a park terminal on the control board?

  23. memoj214 Says:

    I don’t like the idea of leaving a motor running 24/7 until you got that board. You should have gotten a separate fan relay and installed that to the high speed fan wire instead. I think that would have left the customer a bit more comfortable. Besides, leaving the fan on all the time creates more heat when the condenser isn’t on by blowing the motors own heat into a home, therefore causing the a/c to cut on more often, which equals to a high energy bill.

  24. hvacrdude1 Says:

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