How To Reset Furnace After Power Outage. The built in furnace's safety system does not allow for it to turn one during a power outage. Many error codes are simply because the homeowner never changed the filter.
Furnace had not been running although thermostat was set to call for heat. Turn the power back on and then the main gas supply. Press the button in (assuming that this is your issue and that the button has popped).
How/where do i reset it to see if that fixes the problem.
Check the breakers since they may have tripped during the outage. Inspect the circuit breakers—sometimes the breakers can trip during a power outage. If the power is off, turn the thermostat on and set it to the automatic fan setting or heat. It is not safe to rig up the furnace for heating, since it can compromise your health and safety.