How To Reset Furnace Thermostat. Use a paperclip to press the recessed reset button on your thermostat, if it has one. First, you need to locate your circuit breaker and switch off the power supply to the furnace.
This should ignite your furnace. Press the program button three times. Energy experts agree that setting your thermostat to adjust to different temperatures when you're home and away helps to save money on utility bills.
First, turn off the power supply to the furnace by turning off the breaker in the circuit box.
Check both connections to make sure they are tight and once you unplug the cable, you will have to. Make sure the power is on and then open the bleeder valve and let fuel flow until there's a steady stream with no air. Find the switch mounted on or near the furnace and turn the power off. On your thermostat or control unit, turn the heat up so that the furnace will kick on when you restart it.