How to Restart a Gas Furnace After a Power Outage
After a power outage, restarting your gas furnace can be a daunting task, but with the right steps, you can get your home warm and cozy again. This comprehensive guide will walk you through the process of restarting your gas furnace after a power outage, ensuring your safety and the proper functioning of your heating system.
What to Check Before Restarting Your Gas Furnace
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Thermostat Settings: Ensure your thermostat is set to the heating mode and the desired temperature is high enough to trigger the furnace to turn on.
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Circuit Breaker: Locate the circuit breaker panel and identify the breaker that controls the power to your furnace. If the breaker is in the “off” position, flip it to the “on” position. If it’s already on, try turning it off and then back on to reset it.
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GFCI Outlets: If your furnace is connected to a Ground Fault Circuit Interrupter (GFCI) outlet, check if it has tripped during the power outage. Reset the GFCI outlet if necessary.
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Furnace Power Switch: Some furnaces have an on/off switch near the unit. Make sure this switch is in the “on” position.
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Furnace Reset Button: If your furnace has a reset button, typically red or yellow, press it down to reset the furnace. This button is often located near the blower motor.
Resetting the Pilot Light (for Older Furnaces)
If your furnace has a pilot light, you’ll need to reset it after a power outage. Here’s how:
- Turn the circuit breaker off and switch the furnace power button off.
- Access the pilot light by removing the access panel.
- Turn the gas control valve off and let the gas dissipate for five minutes to prevent a fire hazard.
- Turn the gas back on quickly and reignite the pilot light using a barbecue lighter. If the pilot light doesn’t stay lit, try igniting it again. If it still won’t stay lit, contact a professional.
Restarting the Furnace
- Return to the breaker panel and flip the circuit breaker on.
- Turn the furnace back on using the power switch. Wait a couple of minutes to see if everything is in order.
Safety Precautions
- Avoid Electrical Shock: Never touch the breaker with wet hands and use only one hand to flip the breaker switch.
- Gas Safety: When working with gas, ensure the gas control valve is turned off and the gas has dissipated before relighting the pilot light to prevent fire hazards.
- Check for Other Issues: If you notice any signs of electrical issues (e.g., a hot circuit breaker, tripping between on and off positions, or a burning odor), do not attempt to restart the furnace. Instead, contact a professional HVAC technician.
Tools Required
- Barbecue Lighter: For reigniting the pilot light on older furnaces.
- Screwdriver or Fasteners: To remove access panels if necessary.
Summary of Checks Before Restarting
- Thermostat: Ensure it is set to heating mode and the desired temperature.
- Circuit Breaker: Check and reset if necessary.
- GFCI Outlets: Check and reset if necessary.
- Furnace Switch: Ensure it is in the “on” position.
- Reset Button: Press the reset button if your furnace has one.
By following these steps, you can safely and effectively restart your gas furnace after a power outage, ensuring your home stays warm and comfortable. Remember, if you encounter any issues or have concerns, it’s always best to contact a professional HVAC technician for assistance.
