View Full Version : trouble with a CP9C furnace
02-20-2011, 08:10 PM
one of my contractors has 2 CP9C080B12 Coleman furnaces that will not come out of low fire in the test mode and refuse to modulate much past 40 %, the contractor hs changed the board , the motor, the transducer and the air temp disharge sensor , Any ideas ?
02-20-2011, 08:22 PM
02-20-2011, 08:54 PM
i thought about it ....lol
02-20-2011, 09:29 PM
02-20-2011, 10:44 PM
the ductwork is sized well seems to be more mechanical even when you put it into test mode the staging fails to take place
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