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Ifc board

Timco
Timco Member Posts: 3,040
in THE MAIN WALL
Blower comes on when unit is powered up and a demad for heat is present. Usually for only a minute. Fan control bad?

Tim
Just a guy running some pipes.

Comments

  • JP!
    JP! Member Posts: 5
    Goodman IFC board...

    ... When the disconnect is switched on, blower runs constantly, no heat, nothing,,... blower keeps running...

    Transformer is good, 120 in primary, 24 in secondary, fuse on board is good... no apparent damage of any sort... BUT, when I try to jump the terminals, I get nothing.. R to W, R to G... NOTHING....

    What else could it be if not the board?

  • JP!
    JP! Member Posts: 5


    no fan control board.. just a simple IFC... its a 90 plus... i figured if i jumped the terminals, that should suffice... BUT, the led doesnt even come on, so there's no LED codes to read...
  • Timco
    Timco Member Posts: 3,040


    If the lv cicuit was open, the led would tell you. No led usually says bad board. Check continuity of safty loop?
    Just a guy running some pipes.
  • S Ebels
    S Ebels Member Posts: 2,322
    Usually

    If the main fan comes on at power up it's an indication of a popped limit somewhere in the string. Check your roll outs and the high limit. This will happen even if there is no call for heat on a lot of makes depending on the "logic" built into the board. Some makes will run the inducer along with the main also. The board would be the last suspect but it's surely possible.
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