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    jlburr's Avatar
    jlburr Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Jun 9, 2008, 07:16 AM
    Blower problems
    My heat pump has intermittent problem. In the ac mode every once in a while the blower motor fails to come on. When this happens I turn the switch to heat and turn the thermostat all the way up the blower comes on. I then turn it back to cool turn the thermostat down and it stays on and cycles fine. Sometimes it will do this once or twice a day sometimes once a week. All works fine in heat mode. Thanks for any help
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 9, 2008, 09:50 AM
    Sounds like you have a defective or intermittent blower relay.
    jlburr's Avatar
    jlburr Posts: 5, Reputation: 1
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    #3

    Jun 9, 2008, 12:19 PM
    I just find it strange that it only happens in the a/c mode. Thanks
    ac101's Avatar
    ac101 Posts: 463, Reputation: 57
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    #4

    Jun 9, 2008, 12:43 PM
    Jl I found your question sorry I overlooked it before . Im currently resaerching some auto parts online but I will post back with any info I have. GOOD LUCK, AC
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #5

    Jun 9, 2008, 12:43 PM
    It is not strange. In the heat mode a different relay setup is used.
    ac101's Avatar
    ac101 Posts: 463, Reputation: 57
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    #6

    Jun 9, 2008, 04:01 PM
    Jl the model number on my unit is PHJ048-1A I doubt your lucky enough to have the same model but here is the name of the part it is called a time delay relay I had to get mine from a local hvac supplier I never came up with a concrete test for the relay I just eliminated other items based on my wiring diagram. If you are going to replace this yourself be sure the power is OFF before working on it. Maybe these other guys on the board have a method of testing your relay that will verify if that's the problem. Im going to copy this answer to your other post as well. Post back and let me know if you have the exact model that would be one in a million. GOOD LUCK, AC
    jlburr's Avatar
    jlburr Posts: 5, Reputation: 1
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    #7

    Jun 10, 2008, 06:45 AM
    I will get in the attic and do some troubleshooting this weekend thanks for the advise
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