How to Light a Furnace Pilot Light: A Step-by-Step Guide
What is a Furnace Pilot Light?
Before we dive into the process of lighting a furnace pilot light, it’s essential to understand what it is and its purpose. A furnace pilot light is a small flame that ignites the main burner in a forced-air furnace. It’s usually located at the base of the furnace and is responsible for lighting the burner when the furnace is turned on. The pilot light is typically a small, blue flame that is around 1-2 inches tall.
Why is it Important to Light a Furnace Pilot Light?
Lighting a furnace pilot light is crucial for several reasons:
- Safety: A pilot light ensures that the furnace ignites safely and efficiently, reducing the risk of carbon monoxide poisoning and fires.
- Efficiency: A properly lit pilot light helps the furnace burn fuel more efficiently, reducing energy costs and emissions.
- Reliability: A faulty pilot light can cause the furnace to malfunction, leading to costly repairs and discomfort during the winter months.
How to Light a Furnace Pilot Light
Lighting a furnace pilot light is a relatively simple process, but it requires attention to detail and caution. Here’s a step-by-step guide to help you light your furnace pilot light:
Step 1: Turn Off the Power
Before attempting to light the pilot light, make sure to turn off the power to the furnace at the circuit breaker or fuse box. This is an essential safety precaution to prevent accidental ignition or electrical shock.
Step 2: Remove the Access Panel
Locate the access panel on the side or top of the furnace and remove it. This will give you access to the pilot light assembly.
Step 3: Locate the Pilot Light Assembly
Look for the pilot light assembly, which is usually a small metal box with a gas valve and a pilot light orifice. Make sure to identify the correct pilot light assembly, as there may be multiple ones on the furnace.
Step 4: Remove the Pilot Light Cap
Remove the pilot light cap or cover to expose the pilot light orifice. This will allow you to access the pilot light and adjust it as needed.
Step 5: Adjust the Pilot Light Orifice
Use a screwdriver or Allen wrench to adjust the pilot light orifice. Turn the orifice clockwise to increase the flame height or counterclockwise to decrease it. Make sure the orifice is adjusted to the recommended setting for your specific furnace model.
Step 6: Light the Pilot Light
Use a long match or lighter to light the pilot light. Hold the flame to the pilot light orifice for about 5-10 seconds, or until the pilot light ignites. You may need to adjust the orifice or re-light the pilot light a few times to get it to stay lit.
Step 7: Check the Pilot Light
Once the pilot light is lit, check to make sure it’s burning steadily and not flickering. Adjust the orifice as needed to achieve a consistent flame.
Step 8: Replace the Pilot Light Cap
Replace the pilot light cap or cover to protect the pilot light orifice and ensure safe operation.
Step 9: Turn On the Power
Turn the power back on at the circuit breaker or fuse box.
Troubleshooting Common Issues
- Pilot Light Won’t Stay Lit: Check the orifice adjustment, pilot light cap, and gas valve for proper function. Make sure the pilot light is adjusted to the recommended setting and that the gas valve is fully open.
- Pilot Light Flickers or Burns Erratically: Check the orifice adjustment and make sure it’s set to the recommended setting. Adjust the orifice as needed to achieve a consistent flame.
- Pilot Light Won’t Light: Check the gas valve and make sure it’s fully open. Check the pilot light cap and orifice for proper function. Make sure the pilot light is adjusted to the recommended setting.
Conclusion
Lighting a furnace pilot light is a relatively simple process that requires attention to detail and caution. By following the step-by-step guide outlined above, you should be able to light your furnace pilot light safely and efficiently. Remember to troubleshoot common issues and adjust the pilot light orifice as needed to achieve a consistent flame. If you’re unsure or uncomfortable lighting the pilot light yourself, it’s recommended to consult a professional HVAC technician for assistance.
