Derraj
Nov 8, 2012, 08:09 AM
I have a 2 ton air handler, that uses electric heat, when I put the t'stat in cooling at set the fan switch on auto it works fine, but when I put it in heat the blower does not run unless I put the fan switch in the "on" position, it worked fine last year, there is a new circuit board and fan relay in it, and it does the same thing, could it be a bad t'stat, it's an old mercury style?