My problem is I put in a new relay in my Trane air handler (built 1987). The fan works fine on auto in the AC mode, but wont kick on for the furnace operation. Burner comes on, and turns off in about 30 seconds, when the fan fails to come on. The fan limit switch seems to work ok. I can run the furnace in manual mode, with the fan in manual on, where the burner stays on after that.I think its a wiring connection error at the relay… any ideas?
