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Our AC unit @ the house is putting out heat instead of cold air. wastold it was the heat reversing valve was not opening and closing.

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If you have a "Heat Pump" there are many causes for your reveresing valve not to close or open depending on which way your system works. You would be wise to have a qualiforned technician test your system to find the cause of problem.
Here is a list of things thast could cause the problem:
control wire for reversing valve disconnected or broken
wrong thermostat
thermostat gone bad
reversing valve coil defective
defrost timer bad (some makes)
system wired incorrectly
The above are just a few......

Posted on Jun 25, 2009

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