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    jhall048's Avatar
    jhall048 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 23, 2009, 09:47 AM
    Freeze up
    I have a Intertherm air conditioning unit model#C3QA-047U-B when I want it to cool the coils and piping freeze up and it begins to make a humming noise.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jul 23, 2009, 09:56 AM
    Turn it off
    Before you cause damage
    Does it have a clean filter?
    Has it been serviced,are the coils clean,both outside and inside evaporater coil
    Is the blower fan running at a consistent and proper speed?
    Does it have a history of being low on refrigerant?
    If so it has a leak that need to be fixed,
    Refrigerant doesn`t wear out,should need to be added unless it leaks out
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