How to relight a gas furnace pilot light?

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

Relighting a gas furnace pilot light can seem like a daunting task, but with the right steps, you can get your furnace up and running again in no time. In this article, we will walk you through the process of relighting a gas furnace pilot light, covering the common causes of pilot light issues, the necessary tools and materials, and the step-by-step procedure.

Common Causes of Pilot Light Issues

Before we dive into the relighting process, it’s essential to understand the common causes of pilot light issues. Here are some of the most common reasons:

• Dirty or clogged pilot orifice: A dirty or clogged pilot orifice can prevent the pilot light from igniting properly.
• Incorrect gas pressure: Low or high gas pressure can cause the pilot light to malfunction.
• Faulty thermocouple: A faulty thermocouple can prevent the pilot light from igniting or staying lit.
• Clogged burner: A clogged burner can prevent the pilot light from igniting or staying lit.
• Dirty or corroded ignition electrode: A dirty or corroded ignition electrode can prevent the pilot light from igniting properly.

Necessary Tools and Materials

To relight a gas furnace pilot light, you will need the following tools and materials:

• Pilot light relight kit: A pilot light relight kit typically includes a new pilot orifice, a thermocouple, and a burner.
• Gas shut-off wrench: A gas shut-off wrench is used to shut off the gas supply to the furnace.
• Screwdriver or Allen wrench: A screwdriver or Allen wrench is used to remove the furnace cover and access the pilot light assembly.
• Safety glasses and gloves: Safety glasses and gloves are recommended to protect yourself from potential hazards.

Step-by-Step Procedure

Relighting a gas furnace pilot light is a relatively straightforward process. Here are the steps to follow:

Step 1: Shut Off the Gas Supply

• Locate the gas shut-off valve and turn it clockwise to shut off the gas supply to the furnace.
• Verify that the gas supply is shut off by checking the valve and the furnace’s gas gauge.

Step 2: Remove the Furnace Cover

• Remove the furnace cover by unscrewing the screws or clips that hold it in place.
• Set the cover aside and take note of the location of the pilot light assembly.

Step 3: Access the Pilot Light Assembly

• Use a screwdriver or Allen wrench to remove the screws or clips that hold the pilot light assembly in place.
• Gently pull the assembly out of the furnace and set it aside.

Step 4: Remove the Old Pilot Orifice

• Use a screwdriver or pliers to remove the old pilot orifice from the pilot light assembly.
• Dispose of the old orifice and any debris that may be present.

Step 5: Install the New Pilot Orifice

• Take the new pilot orifice from the pilot light relight kit and install it in the pilot light assembly.
• Make sure the orifice is securely seated and tightened according to the manufacturer’s instructions.

Step 6: Install the New Thermocouple

• Take the new thermocouple from the pilot light relight kit and install it in the pilot light assembly.
• Make sure the thermocouple is securely seated and tightened according to the manufacturer’s instructions.

Step 7: Reassemble the Pilot Light Assembly

• Reassemble the pilot light assembly in the reverse order that you disassembled it.
• Make sure all screws and clips are securely tightened.

Step 8: Turn On the Gas Supply

• Turn the gas shut-off valve counterclockwise to turn on the gas supply to the furnace.
• Verify that the gas supply is turned on by checking the valve and the furnace’s gas gauge.

Step 9: Relight the Pilot Light

• Use a screwdriver or pliers to press the pilot light button or igniter.
• Hold the button or igniter for a few seconds to allow the pilot light to ignite.
• Once the pilot light is lit, release the button or igniter and allow the furnace to heat up.

Troubleshooting Tips

If the pilot light does not ignite after following the above steps, there may be a few things you can try:

• Check the gas supply: Make sure the gas supply is turned on and the pressure is correct.
• Check the pilot orifice: Make sure the pilot orifice is clean and free of debris.
• Check the thermocouple: Make sure the thermocouple is securely seated and functioning properly.
• Check the ignition electrode: Make sure the ignition electrode is clean and free of debris.

Conclusion

Relighting a gas furnace pilot light is a relatively straightforward process that requires the right tools and materials. By following the steps outlined above, you should be able to relight your pilot light and get your furnace up and running again. Remember to always follow safety precautions when working with gas appliances, and if you are unsure about any part of the process, it’s always best to consult a professional.