How to Connect a Generator to a Gas Furnace

Gas furnaces use gas to provide heat to a home, but they often rely on electricity to ignite the gas and to run other systems in the furnace effectively. If you lose power for an extended period during the winter, a generator can be a lifesaver because it allows you to run the furnace temporarily to reheat your house. Connecting the generator to the gas furnace requires care to prevent a household accident.

Heavy-duty extension cord

Instructions

- 1
  Shut off all the breakers in the house. This prevents power surges when power is restored that could damage the furnace and other appliances.
- 2
  Verify that your generator is an appropriate size to power your furnace. A 4,000- to 6,000-watt generator usually is effective for a gas or propane furnace.
- 3
  Unplug the furnace and move the plug over to the generator. If the cord is too short, use an orange extension cord heavy-duty enough to handle the power load to connect the generator and the furnace.
- 4
  Turn on the generator and allow it to power up so it provides electricity.
- 5
  Power on the furnace as you normally would. Monitor the power left in the generator as the furnace runs so you can shut off the furnace before the generator dies.

How to Stop a Water Leak in a Toilet Tank Using Liquid

How to Plumb an Island Drain Vent

Home Maintenance