First post here ...
I just bought a 10 year old house that has a split HVAC system (outside A/C unit with an inside air handler/electric heat unit).
The air handler is a Trane model #TWE048C14
Even though the thermostat is in the Fan Auto position, the blower in the air handler continually runs (even when the A/C compressor outside turns off)
I replaced the old Honeywell wall mounted digital thermostat with a brand new Honeywell touch screen thermostat in hopes that the new thermostat would fix this problem, but it did not. Everthing is wired correctly. In fact, even when I remove the new thermostat from the wall, the air handler blower always runs. The only way to get it to turn off is by flipping off the air handler's circuit breaker in the main circuit breaker panel.
From what I have read on various internet sites, there are many parts in the common residential air handler that could cause this problem ....
2. Fan Relay
4. Circuit Board
I am hoping someone here might have previous experiance with these Trane / American Standard air handlers that might lead me in the right direction with this. Maybe my Trane don't have all 4 of the items listed above, but maybe one of the parts listed above are common in these Trane units that cause the blower fan to keep running 24/7.
Any help would be very much appreciated.