Heatilator gcdc60 won't turn off unless I disconnect one of the thermostat lead wires or I move the control know on the Robershaw 7000 valve to "off". It burns fine, and fan comes on when it is supposesd to, but the crazy thing doesn't want to turn off! Suggestions? thx Ed Marshall akron, oh
Heating & Cooling - Williams - 2509612 Ceramic Mid-Size Heater
Answers & Comments
From everything you tried to cover, the problem lies in the wall thermostat. Repairing it isn't a good option. Replacing it is fairly inexpensive to do. Just make sure you replace it with one of the same voltage. Or if it's a millivolt control valve on the heater, make sure the replacement is for millivolt operation.
Hope this helped you solve the problem.