How to fix furnace pilot light?

How to Fix Furnace Pilot Light: A Step-by-Step Guide

Is your furnace not heating your home properly due to a pilot light issue? Don’t worry; it’s a common problem that can be easily fixed. In this article, we’ll guide you through the process of troubleshooting and repairing a furnace pilot light.

Understanding the Pilot Light

Before we dive into the fix, it’s essential to understand what the pilot light is and its role in your furnace. The pilot light is a small flame that ignites the gas that heats your home. It’s usually located near the bottom of the furnace and is responsible for keeping the main burner lit.

Common Causes of a Pilot Light Issue

Before you start troubleshooting, it’s helpful to know what can cause a pilot light issue:

• Faulty Thermocouple: A thermocouple is a sensor that detects the presence of gas and keeps the pilot light lit. If it’s faulty, the pilot light may not stay lit.
• Clogged or Dirty Pilot Light Orifice: The pilot light orifice is a small hole that allows gas to flow into the furnace. If it’s clogged or dirty, the pilot light may not get enough gas to stay lit.
• Incorrect Pilot Light Settings: If the pilot light is not set to the correct height or is not adjusted properly, it may not stay lit.
• Gas Pressure Issues: Low gas pressure can cause the pilot light to go out.

How to Fix a Furnace Pilot Light

Here’s a step-by-step guide to help you fix a furnace pilot light:

Step 1: Turn Off the Power

Before you start, make sure to turn off the power to the furnace at the circuit breaker or fuse box. This is an important safety precaution to prevent accidental ignition of the pilot light.

Step 2: Turn Off the Gas Supply

Locate the gas shut-off valve and turn it clockwise to shut off the gas supply to the furnace.

Step 3: Remove the Pilot Light Housing

Locate the pilot light housing and remove any screws or clips that hold it in place. Be careful not to touch any electrical components.

Step 4: Clean the Pilot Light Orifice

Use a soft-bristled brush or a small screwdriver to clean out any debris or dust that may be blocking the pilot light orifice.

Step 5: Check the Thermocouple

Check the thermocouple for any signs of damage or wear. If it’s faulty, you may need to replace it.

Step 6: Check the Pilot Light Settings

Make sure the pilot light is set to the correct height and is adjusted properly.

Step 7: Relight the Pilot Light

Turn the gas supply back on and attempt to relight the pilot light. If it doesn’t stay lit, you may need to adjust the pilot light orifice or check for gas pressure issues.

Troubleshooting Tips

Here are some additional troubleshooting tips to help you fix a furnace pilot light:

• Check for gas leaks: Make sure there are no gas leaks in the furnace or nearby pipes.
• Check the furnace filter: A dirty furnace filter can reduce airflow and cause the pilot light to go out.
• Check the thermostat: Make sure the thermostat is set to "heat" and that the temperature is set to a reasonable level.

Common Pilot Light Issues and Solutions

Here are some common pilot light issues and solutions:

Conclusion

Fixing a furnace pilot light is a relatively simple process that requires some patience and attention to detail. By following the steps outlined in this article, you should be able to troubleshoot and repair a furnace pilot light issue. Remember to always turn off the power and gas supply to the furnace before attempting to fix the pilot light, and never attempt to repair the furnace yourself if you’re not comfortable with DIY projects. If you’re still having trouble, it may be best to consult a professional HVAC technician.