Search results

To check the thermostat, go to the furnace and locate the low voltage connections from the thermostat. When you override the program to force heat, you should have 24V from the white wire (or W terminal) to the Common (C terminal). If not, the Tstat is not calling for heat.

American Standard also manufactures Trane. Basically the same equipment with a slightly different look. From my experience both are good equipment. The installation is really what makes the difference.

QUOTE=Scottphys;18897]It is. My DVM reads ~130 volts across the output of the contactor while the one leg of the contactor is open (the other pole is straight through). Compressor is not on, fan is. If I remove the compressor leads from the contactor output, the fan stops. It seems as if...

If this is a horizontal system in the attic, you have to check the air chase in the wall to which the return air duct is attached. There are commonly air leaks in this area between walls and from the attic. If you stick a bright light in through the air filter, go into the attic and carefully...

the problem you have is a wiring issue. If the compressor not running but the fan motor is, that means the contactor is open but the fan is still energized. The hot wires to the fan motor are on the hot side of the conotactor. Connect the fan motor to the same side of the contactor as the...