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  1. #1

    Blower Motor Problem with Carrier

    I have a Carrier FB4CNF060 heat pump unit and the blower motor cuts out about ever 3-5 minutes. The motor has been replaced and still same problem. The unit doesn't seem to have a main circuit board, the motor is definitely getting proper voltage. The leads connect to two small circuit boards with resistors on them. The motor wiring diagram does not describe what these boards are. The unit does this whether it is running in AC or Heat mode. Any help on this is greatly appreciated.

    Thanks.

  2. #2
    Join Date
    Jun 2013
    Location
    calgary
    Posts
    17
    pics?

  3. #3
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,325
    have you checked the amps its pulling ?

  4. #4
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,497
    Quote Originally Posted by hvacsb View Post
    I have a Carrier FB4CNF060 heat pump unit and the blower motor cuts out about ever 3-5 minutes. The motor has been replaced and still same problem. The unit doesn't seem to have a main circuit board, the motor is definitely getting proper voltage. The leads connect to two small circuit boards with resistors on them. The motor wiring diagram does not describe what these boards are. The unit does this whether it is running in AC or Heat mode. Any help on this is greatly appreciated.

    Thanks.
    Forgive me if you are a tech, but this post suggests to me that you are the equipment owner. This is not a DIY site.

    Sorry.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  5. #5
    Quote Originally Posted by timebuilder View Post
    Forgive me if you are a tech, but this post suggests to me that you are the equipment owner. This is not a DIY site.

    Sorry.
    Not a DIYer. I am a tech. I have since repaired and it turned out to be a bad thermostat. Weird that it was cutting out about every 3-5 minutes though which made me think in was some sort of limit.

  6. #6
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,325
    first thing you check is amps .... that is the heart of the motor

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