How Do You Relight a Pilot Light on a Furnace?
Relighting a pilot light on a furnace is a relatively simple process that can be done by a homeowner with basic DIY skills. However, it’s essential to follow the correct procedures to ensure safe and proper operation of your furnace. In this article, we’ll guide you through the step-by-step process of relighting a pilot light on a furnace.
Before You Start
Before attempting to relight the pilot light, make sure you have the following:
- A screwdriver or a wrench to adjust the thermocouple
- A new pilot light assembly or a replacement pilot light kit (if the old one is damaged)
- A match or a lighter
- A furnace manual or the manufacturer’s instructions
- A safe and well-ventilated area
Step 1: Turn Off the Power and Gas
Turn off the power to the furnace: Locate the circuit breaker or fuse box and switch off the power to the furnace. Verify that the furnace is completely shut down.
Turn off the gas supply: Locate the gas shut-off valve near the furnace and turn it clockwise to shut off the gas supply. Make sure to turn off the gas supply before attempting to relight the pilot light.
Step 2: Identify the Pilot Light Assembly
The pilot light assembly is usually located at the bottom of the furnace, near the burner. It’s a small metal tube with a pilot light at the end. Check your furnace manual or manufacturer’s instructions for the exact location of the pilot light assembly in your specific furnace model.
Step 3: Remove the Pilot Light Assembly
Use a screwdriver or a wrench to remove the pilot light assembly from the furnace. You may need to loosen the retaining clip or screw that holds the assembly in place.
Step 4: Clean the Pilot Light Assembly
Use a soft brush or a cloth to clean the pilot light assembly, removing any debris or dirt that may be blocking the pilot light.
Step 5: Light the Pilot Light
Use a match or a lighter to light the pilot light. Hold the flame to the pilot light for about 30 seconds to ensure it’s lit properly.
Step 6: Adjust the Thermocouple
Use a screwdriver or a wrench to adjust the thermocouple (the metal rod that regulates the pilot light’s temperature). Make sure the thermocouple is properly adjusted to ensure the pilot light stays lit.
Step 7: Replace the Pilot Light Assembly
Put the pilot light assembly back in place and tighten the retaining clip or screw to secure it.
Step 8: Turn On the Gas Supply
Turn the gas shut-off valve counterclockwise to restore the gas supply to the furnace.
Step 9: Turn On the Power
Turn the circuit breaker or reset the fuse to restore power to the furnace.
Step 10: Test the Pilot Light
Check the pilot light to ensure it’s still lit. If it’s not, repeat the process as necessary.
Tips and Precautions
- Make sure to turn off the gas supply before attempting to relight the pilot light to prevent accidental ignition.
- Use a match or a lighter to light the pilot light, as these are the safest and most reliable options.
- Do not use a flame from another source, such as a candle or a torch, to light the pilot light.
- Keep the area around the furnace well-ventilated to prevent the buildup of carbon monoxide.
- If you’re unsure or uncomfortable relighting the pilot light, contact a professional HVAC technician for assistance.
Troubleshooting Common Issues
| Issue | Solution |
|---|---|
| Pilot light won’t stay lit | Check and adjust the thermocouple. |
| Pilot light won’t light at all | Check for gas leaks, ensure the gas supply is turned on, and clean the pilot light assembly. |
| Pilot light is too high or too low | Adjust the pilot light assembly to the correct height or position. |
In conclusion, relighting a pilot light on a furnace is a relatively simple process that requires attention to detail and basic DIY skills. By following the steps outlined above and taking the necessary precautions, you can ensure your furnace is operating safely and efficiently. If you’re unsure or uncomfortable relighting the pilot light, it’s always best to contact a professional HVAC technician for assistance.
