It's that first cold night of the season and you go to turn on the furnace... and nothing happens. Before calling for service, check the following items:
- Is there power? - Even though it may be gas powered, a furnace requires electricity to run, so check the power to the unit at the circuit breaker panel. If a circuit is tripped, switch it back to the ON position. Note, if the circuit trips again, DO NOT RESET IT MORE THAN ONCE, this is a safety measure to prevent an electrical fire in the event of a malfunction. Have an electrician inspect the system.
- Is the thermostat turned to the HEAT position? Try turning the temperature up several degrees to see if it turns on.
- Is the condensate pan clogged? During normal operation water will drain from the air conditioner or furnace into a drain pan. If the drain for the pan is clogged the pan will fill up and trigger a float switch, preventing the operation of the furnace. If the float switch is up (activated), you will need to clear the obstruction to allow water to empty and then reset the switch.
- Is the furnace filter dirty? An extremely dirty and clogged filter will cause the furnace overheat, which will cause it to shut down as a safety precaution. Install a new filter.
- Is the pilot light lit? This only applies to older gas furnaces. Most newer units have electric ignition. If your pilot light is out consult your owner's manual for the correct way to light the pilot.
- Check the fuel supply. If there are other gas appliances in the home, such a gas range or fireplace, check that they are functioning.
If none of the above steps works and the furnace still won't turn on, call Maitz Home Services. We can repair all makes and models of furnace.