Have HVAC Questions? Ask an HVAC Expert for Answers
just to confirm....you have wires on R and W in the thermostat?
When touched direct together the furnace runs..but does not through thermostat?
sorry for the delay.
I cannot say if it was related to shut down...but I can say the thermostat has no provision for being field repaired.
These types of thermostats run less than $40 so the most viable option is to replace.
Whether shut down related or not the connection relay in the thermostat is defective now. The thermostat will need to be replaced.
if it works by touching wires together and NOT a new thermostat then the only reason can be less than 24v to thermostat. This would be a transformer issue