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    cmwotring's Avatar
    cmwotring Posts: 1, Reputation: 1
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    #1

    Aug 21, 2008, 09:22 AM
    a/c not cooling after replaced fan motor
    I recently replaced a condenser fan motor. New motor works great. However, no cold air. I've noticed while outside unit running the fan will turn off for a fraction of a second and then back on. Is this a compressor problem now? A maintenance tech at the factory I work at suggested "jump starting" the compressor with a larger capacitor and then replacing normal cap. Is that a load? Thanks in advance.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Aug 21, 2008, 06:36 PM
    (((I work at suggested "jump starting" the compressor with a larger capacitor .)))
    I wouldn`t advise that,, you could try replacing the capactor,, but with a exact match to the one you have,the new motor you replaced should have a new seporate capactor all to its self
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #3

    Aug 21, 2008, 06:54 PM
    This momentary slowing of the fan motor may be the compressor trying to start, check your capacitor for the compressor, if bad relpace it . A start booster capacitor can be added to help it start if after replacing the run capacitor and it still won't start. Good luck, Mike
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #4

    Aug 21, 2008, 07:22 PM
    If the A/C system is kicking off and then on (compressor and fan motor) I would say a low pressure or high pressure switch is locking it out. Low pressure switch= low air flow, low on refrigerant charge, restricted metering device at evaporator coil and so on. High pressure switch= dirty condenser coil, over charged, condenser fan motor not running or running backwards or restricted metering device and so on.
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