Posted 10 April 2013 - 10:30 AM
Suspect the dampers...first , I would look at the custom cool drawer. There are 2 Dampers...1 supply ,1 return. They should work together...if one is open the other should be open. Same with closing. If you find one open and one closed, that is the problem. The one that is not closing is the bad one, and it is available as a separate part without replacing the almost $400 air handler.
The upper damper could also be broken I find the CC to be the prob most often.
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