No power to thermostat
Check all breakers and fuses, all works. Thermostat turned off due to broken piece inside the heater. Simple suburban thermostat, any suggestion how to figure it out? Thanks
Forum Discussion
broken fan= furnace shutdown in most cases since the fan must push enough air to close the sail switch to start the gas flow.
measuring across the thermostat leads may not show any voltage. you aren't measuring between a hot and ground. just switch for the hot lead.
best way to test is to just short the two wires to the thermostat. If the furnace starts then but not with thermostat that means thermostat is bad. If it doesn't start with the wires shorted together, then there is at the very least a furnace issue.
measuring across the thermostat leads may not show any voltage. you aren't measuring between a hot and ground. just switch for the hot lead.
best way to test is to just short the two wires to the thermostat. If the furnace starts then but not with thermostat that means thermostat is bad. If it doesn't start with the wires shorted together, then there is at the very least a furnace issue.
