Product review (5 stars): It was very easy to replace minus the lack of room in my ...
I have a old 1992 Trane/American Standard TWH series air handler, it completely stopped shutting off when the house reached the desired temp on the thermostat. The only way to get the air handler fan off was to shut it off at the breaker. This relay has never been changed since new. Although the new relay looks completely different all the wires are the same but in a different location. T on the old relay goes to T on the new one and so forth. The new relay has COM and NO my old relay doesn't have those. 1 on the old relay is COM and 3 on the old relay is NO on the new one. It was very easy to replace minus the lack of room in my attic, I printed labels in advanced and labeled the wires one by one to make it easier.