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Heated air coming out when unit is in Cool Mode

\015 Heated air is coming out of the vents when the unit is on Cool Mode. Outside at the condensor it feels like the cold air is being exhausted to atmosphere. I believe the unit is not reversing the cycle. Heat Mode is functioning properly when selected. Cool cycle is the problem.\015

Answers :

Heat pumps are sometime constructed to "Fail in the heat mode." It could be either the t'stat or the reversing valve. Be sure the t'stat is wired correctly. Usually the"O" terminal is for the reversing valve on the outdoor unit.

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