Pilot Goes Out On Furnace: Troubleshooting Tips For Homeowners

How To Light Furnace Pilot Light Honeywell unugtp
How To Light Furnace Pilot Light Honeywell unugtp from unugtp.is


In the cold winter months, a reliable furnace is essential to keep your home warm and cozy. However, a common issue that homeowners face is the pilot going out on their furnace. This can be frustrating and inconvenient, especially when you need your heating system the most. In this article, we will discuss the possible reasons why your pilot light keeps going out and provide some troubleshooting tips to help you resolve the issue.

1. Lack of Gas Supply

One possible reason for a pilot light going out is a lack of gas supply. Check if the gas valve is open and if there are any leaks in the gas line. If you suspect a gas leak, it is crucial to contact a professional immediately for assistance. Ensure that the gas supply to your furnace is uninterrupted and functioning correctly.

2. Dirty Pilot Orifice

A dirty pilot orifice can obstruct the flow of gas to the pilot light, causing it to go out. Carefully clean the orifice with a small brush or compressed air to remove any dirt or debris. This should be done gently to avoid damaging the orifice. Regular maintenance and cleaning of the pilot orifice can help prevent this issue.

3. Faulty Thermocouple

The thermocouple is a safety device that detects whether the pilot light is lit. If it detects that the pilot light is not lit, it shuts off the gas supply to prevent a dangerous gas leak. A faulty thermocouple may mistakenly sense that the pilot light is out and shut off the gas supply. Consider replacing the thermocouple if you suspect this to be the issue.

4. Drafts or Air Flow Issues

Drafts or air flow issues can also cause the pilot light to go out. Check for any open windows or doors near the furnace that may be causing a draft. Additionally, ensure that the air intake and exhaust vents are not blocked by debris or obstructions. Proper air flow is crucial for the pilot light to stay lit.

5. Improperly Adjusted Flame

An improperly adjusted flame can lead to the pilot light going out. The flame should be strong and blue, with a steady flow of gas. If the flame is weak, yellow, or flickering, it may not be able to stay lit. Consult the furnace’s manual to learn how to adjust the flame properly or consider seeking professional help.

6. Pilot Tubing Issues

Issues with the pilot tubing can also cause the pilot light to go out. Check for any kinks or blockages in the tubing that may be obstructing the flow of gas to the pilot light. If you notice any damage or issues with the tubing, it may need to be repaired or replaced by a professional.


Experiencing a pilot light going out on your furnace can be a frustrating situation, especially during the cold winter months. By troubleshooting the possible causes mentioned above, you can identify and resolve the issue. However, if you are unsure or uncomfortable performing any of these troubleshooting steps, it is always recommended to seek professional assistance. Regular maintenance and care of your furnace can help prevent such issues and ensure a warm and comfortable home throughout the winter season.