XE90 Gas Furnance, LED 4 blinks
Hi, I'm new here and don't know how to post but Ive been reading this thread,
Someone mentioned the Open High Limit Switch on a Trane XE 90, (LED blinking 4 times) I think thats whats wrong with my unit, where is it located? There are two wires going to a sensor on the fire chamber but no reset switch, might that be it, do I replace it, just unscrew it and put a new one in? If it's not resettable.