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    Shep66's Avatar
    Shep66 Posts: 3, Reputation: 1
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    #1

    Nov 2, 2013, 05:58 PM
    Parts needed to bypass obsolete circuit board
    Coleman Air Handler Model #AH12H10BA
    Circuit Board # 3612-310

    Technician will install parts if I purchase them.

    He said that I need a fan relay and heat sequencers and temperature limit switches.

    Can you please let me know what part numbers I need to order?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Nov 3, 2013, 07:13 PM
    Let the tech tell you. He knows the unit.
    Shep66's Avatar
    Shep66 Posts: 3, Reputation: 1
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    #3

    Nov 12, 2013, 03:54 AM
    Quote Originally Posted by ma0641 View Post
    Let the tech tell you. He knows the unit.
    Thanks for answering back. I finally got ahold of him, but I guess that it is illegal for him to do this out of his company. So that is why I have to do the leg work to get the parts. He said that all I have to have is the fan relay. He got a dual sequencer out of another dead unit. The fan relay was not good. I found a lot of fan relays any suggestions on which one I should get?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Nov 12, 2013, 09:05 AM
    Fan relays are pretty simple. Just match input and output ratings. Problem is the ones on a circuit board don't have wires, they have soldered pins. So get one with wire leads if possible or you will need to solder leads on. Try Grainger or an electrical supply store.
    Shep66's Avatar
    Shep66 Posts: 3, Reputation: 1
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    #5

    Nov 17, 2013, 12:25 AM
    Quote Originally Posted by ma0641 View Post
    Fan relays are pretty simple. Just match input and output ratings. Problem is the ones on a circuit board don't have wires, they have soldered pins. So get one with wire leads if possible or you will need to solder leads on. Try Grainger or an electrical supply store.
    Thank you. He is just going to use 2 sequencers, one for the heat and one for the fan relay. Hope he knows what he is doing...
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