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A c unit goes into defrost too soon then it will possibly go out of defrost and hiss loudly current draw rises over 20 amps trips breaker model is a L G L 12463hl 7 k w wall split

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It sounds like the head pressure is to high. This is sometimes do to overcharging. The hissing noise that you hear is the liquid refrigerant dumping into the suction side. This is what a compressor does when the Head pressure is way too high. The fact that it is tripping the breaker may be to a broken suction valve in the compressor. I think it might be time for a new unit.

Posted on Jul 03, 2008


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