How to determine if a defrost board is functional

The carrier heat pump will not initiate defrost.

Make: carrier heat pump

Model: 38YXA036300

Comments for How to determine if a defrost board is functional

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Jan 03, 2014
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EverRest Goodman Heat/Pump 13 SEER
by: Anonymous

I think I have the same problem in this cold in PA. The thermostat switched over to emergency run, I just sent e-mail to the servicing contractor. I hope edwin will address this problem in a short time. In emergency mode the thermostat setting is not controlling temp. and the temperature runs till the system is turned off or switched back to auto mode. I just can't believe that these new systems are nothing else just aggravation. New unit installed in July 2013.

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