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Chilled air flow is changing to warm air flow periodically, approx. 3-4 min chilled then 3-4 min warm as ambient air temp.

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Sounds like a classic floating restriction. An A/C unit with a leak on the low pressure side can **** in moisture which is then pumped through the system, as it goes through the metering device, typically a capillary (very thin) tube, it freezes, creating a blockage. The discharge air warms, the ice melts and circulates again. During the circulation, you get cool air.

The problem could also be electrical. A faulty overload device or the compressor in the process of failure, could give these symptoms. Best thing to do is shut it off and have a pro take a look. If it is a window unit, look for a local refrigeration school to check it out. THey will often do the repair for the cost of the parts.

Posted on Jul 19, 2010


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A mechanical drawing of the system before installation (assuming an architect drew and approved the plans) should be at the malls office. Also the building inspectors office may have a copy of them.

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1 Answer

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