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    coloradojohn's Avatar
    coloradojohn Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jul 28, 2008, 09:43 AM
    With AC on blower fan runs then stops
    My problem is that the air conditioning unit (Trane) runs fine however when the blower turns on it will run for 25-30 seconds and then turns off for 60-90 secords before turning on again. If I run the furnace the blower operates as expected. One service company has indicated that it sounds like a winding on the blower fan motor has gone bad causing this intermitten cycling to occur and suggest replacing the motor. Has anyone had a similar problem or heard of something like this that could confirm their findings or dispute them. Thank you for your help!
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jul 28, 2008, 10:30 AM
    Check the capiciter,, they only cost a few dollars much less than buying a new motor,if the winding is bad in motor I don`t think it would run at all,not even a little bit.. if you don`t have the means to check capiciter take it to a electric shop and have it tested
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jul 28, 2008, 11:00 AM
    My problem is that the air conditioning unit (Trane) runs fine however when the blower turns on it will run for 25-30 seconds and then turns off for 60-90 secords before turning on again. If I run the furnace the blower operates as expected

    If you run the furnace and the blower operates normally it is probably not the motor or capacitor But something in the A/C circuit. It could be the control board or your thermostst.

    What is the model number and brand of your thermostat?
    coloradojohn's Avatar
    coloradojohn Posts: 2, Reputation: 1
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    #4

    Jul 29, 2008, 07:47 PM
    Quote Originally Posted by hvac1000
    My problem is that the air conditioning unit (Trane) runs fine however when the blower turns on it will run for 25-30 seconds and then turns off for 60-90 secords before turning on again. If I run the furnace the blower operates as expected

    If you run the furnace and the blower operates normally it is probably not the motor or capacitor But something in the A/C circuit. It could be the control board or your thermostst.

    What is the model number and brand of your thermostat?
    wmproop's - it's a Honeywell model tb112d1005 or pf1a, sorry but the prior owner installed and there are no obviouse markings on the unit. Thank for your help!
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #5

    Jul 29, 2008, 08:42 PM
    Sorry no numbers in Honeywell factory list matches the numbers you provided.
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