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Aitconditioner air not blowing cold, return line frosted up?

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  • Anonymous Jun 09, 2008

    I have a carrier unit. Fan and condenser are running, but no air coming out of vents from first or second floor. Thermostat seems to be working fine.

  • ddsw Jun 09, 2008

    I have the same problem. We have two zones. The unit for the upstairs has only been used for 2 seasons. The thermostat is fine, the unit will turn on, but blows only semi-cool air and cannot cool upstairs of our home.

  • burzerko
    burzerko May 11, 2010

    is it the larger of the two lines that is freezing up?

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If it is the larger of the two lines check your filters in your inside unit. Also check to see if the fan is blowing. If both of these are ok most likley you are low on refrigerant.

Hope this helps

Posted on Jun 22, 2008

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Circuitboard or fan motor, (backtrack from the fan motor voltages)!

Posted on Jun 09, 2008

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