How To Relight A Pilot Light In A Furnace

How to Relight a Pilot Light in a Furnace: A Step-by-Step Guide

Having a furnace that won't turn on can be incredibly frustrating, especially during colder months. Often, the problem lies with the pilot light. Fortunately, relighting a furnace pilot light is a relatively simple task that many homeowners can handle themselves. This guide will walk you through the process safely and effectively, saving you the cost of a service call.

Safety First!

Before you even think about touching your furnace, prioritize safety. Always turn off the gas supply to the furnace. This is usually a valve located near the furnace itself; it will likely be a knob or lever. Turn it fully to the "off" position. This crucial step prevents gas leaks and potential hazards. Proper ventilation is also essential. Make sure your furnace area is well-ventilated to avoid the build-up of gas.

Locating the Pilot Light and Necessary Tools

The location of your pilot light may vary depending on your furnace model. It's usually found at the bottom of the furnace, behind a small access panel. You might need a screwdriver to remove this panel. Once you locate the pilot light, you'll need a few tools:

• A long lighter or match: You'll need something with a long reach to ignite the pilot light safely. A lighter with a narrow flame is preferred for precision.
• A screwdriver (possibly): To remove the access panel covering the pilot light.

Step-by-Step Instructions for Relighting Your Furnace Pilot Light

1. Turn Off the Gas Supply: As mentioned earlier, this is the most critical safety step. Double-check that the gas valve is completely turned off.
2. Locate the Pilot Light and Access Panel: Carefully remove the access panel, if needed. You should see the pilot light assembly, including the thermocouple, pilot burner, and gas valve.
3. Check for Gas Leaks: Before proceeding, check for any gas leaks around the pilot light assembly. You can do this by carefully applying a soapy water solution around the connections. If you see any bubbles forming, there's a gas leak, and you should immediately contact a qualified gas technician. Do not attempt to relight the pilot light if you detect a gas leak.
4. Push the Gas Button: Most furnace models have a gas button that you need to hold down while lighting the pilot light. The exact location and method may vary, so refer to your furnace's instruction manual if you're unsure.
5. Light the Pilot: Carefully use your long lighter or match to light the pilot light. Keep the gas button depressed. You should see a small flame ignite.
6. Hold the Button: Continue to hold the gas button down for at least 60 seconds, or as recommended in your furnace's manual. This allows the thermocouple to heat up and remain lit. Releasing the button too soon can cause the pilot light to go out.
7. Check the Flame: After holding the button, carefully release it. The pilot light should remain lit. If it goes out, repeat steps 4-6.
8. Replace the Access Panel: Once the pilot light remains stable, carefully replace the access panel.
9. Turn the Gas Supply Back On: Slowly turn the gas supply back on.

Troubleshooting:

• Pilot Light Won't Stay Lit: If the pilot light repeatedly goes out, the thermocouple may be faulty. This is a component that senses the flame and keeps the gas flowing. You'll likely need to contact a professional to replace it.
• No Flame at All: Ensure the gas supply is turned on to the furnace and check the gas lines for blockages. If you still can't get a flame, contact a professional.

When to Call a Professional

While relighting a pilot light is a manageable task for many, some situations necessitate professional help. If you're uncomfortable performing this task, or if you encounter any persistent problems, such as gas leaks, a consistently extinguishing pilot light, or a complete failure to ignite, call a qualified HVAC technician immediately. Your safety and the proper function of your heating system are paramount.

This comprehensive guide provides a step-by-step approach to relighting your furnace pilot light, highlighting safety precautions and troubleshooting common issues. Remember, your safety is crucial, so don't hesitate to call a professional when needed.