All of a sudden I noticed my heat was running non stop. So I went to the thermostat and clicked it to the off position, it went off. I decided to see if the air was doing the same. Sure enough flip it over to air the air will run constantly. In both cases it was not just the fan running, the heat heated and the air cooled. In fact if you flip the system from auto to fan it goes off and nothing runs.
I thought I would try replacing the thermostat first. So armed with a new one I replaced everything, re-stripped wires in case one was broken. Hooked everything back up, flipped the switch to heat and again it would not shut off, same with the air. Again I flipped the switch from auto to fan and it goes off. :confused:
Today I went and bought a new relay and thought that would for sure fix it. It didn't work same issue's. I even unhooked the red and white coming from the outdoor unit and nothing has changed except for the air not kicking on now. I'm really at a loss as to what it can be. Any help would be greatly appreciated.
Furnace information:
Miller E3EB-015H, 017H