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    vegasbusa's Avatar
    vegasbusa Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Oct 30, 2009, 05:31 PM
    Test a fan in ac unit?
    Without pulling it out of the unit, is there a way to test a fan? I took the red and green wires off the tstat and put them together and still no fan. I put a new capacitor in and still get nothing. I wanted to see if there is a way to easily test the fan to see if it works. Thanks.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 30, 2009, 05:36 PM
    Take a 120 volt jumper cord and attach it to the motor power leeds. Now if it is a 240 volt unit then you can do the same but you will need a 240 volt power source.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #3

    Oct 30, 2009, 05:37 PM
    Trace the wires from the fan,, where they tie to or hook up,with a multi-meter check both legs for power,230 volts,if there is power and the fan doesn`t work, well you must have a bad motor, as long as you are sure the capicitor was replaced with the exact replacment
    vegasbusa's Avatar
    vegasbusa Posts: 4, Reputation: 1
    New Member
    		  
    #4

    Oct 30, 2009, 05:53 PM

    It looks as though there are more than just two wires going to the fan, which ones do I hook up power to? The unit is a carrier and it says "Cobra" on the door.
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member
    		  
    #5

    Oct 30, 2009, 06:57 PM

    Connect to the white and black wire coming out of the motor, make sure that the brown wire and the brown wire are conndeted to a separate capacitor that it called for to be use with that motor.. If you hear a buss try to spin the motor fast just in case the start capacitor is not good. Now if you don't get the motor to run I am afraid you have a bad motor.
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