Fireplace Pilot Light Keeps Turning Off

Fireplace Pilot Light Keeps Turning Off: Troubleshooting Guide

A fireplace pilot light that keeps turning off can be a frustrating problem, especially during the colder months when you rely on your fireplace for warmth. This issue could be caused by several factors, ranging from low gas pressure to a faulty thermocouple. Fortunately, most of these problems can be addressed with a few simple troubleshooting steps, saving you the cost of calling a professional.

Checking Gas Pressure

One of the most common causes of a pilot light that keeps turning off is low gas pressure. Gas pressure is essential for maintaining a consistent flame in the pilot light, and fluctuations can cause it to extinguish. To check the gas pressure, follow these steps:

Turn off the gas supply to the fireplace.
Locate the gas valve on the fireplace and carefully remove the valve stem.
Inspect the valve stem for debris or obstructions that may be hindering gas flow.
Turn the gas valve on and observe the gas flow. If the flow is weak or irregular, it indicates low gas pressure.

If you find low gas pressure, you should consult a qualified gas technician to address the issue. Attempting to fix low gas pressure yourself can be dangerous, so it is crucial to leave it to a trained professional.

Inspecting the Thermocouple

The thermocouple is a safety device that senses the pilot light flame and keeps the gas flowing to the fireplace. If the thermocouple malfunctions, it will fail to detect the flame and shut off the gas supply, causing the pilot light to extinguish.

To inspect the thermocouple, follow these steps:

Turn off the gas supply to the fireplace.
Locate the thermocouple, which is usually a small metal rod attached to the pilot light.
Check the thermocouple for any signs of damage, such as cracks or corrosion.
Carefully touch the tip of the thermocouple to see if it is warm. If it is not, the thermocouple might be faulty and needs to be replaced.

Replacing a thermocouple is a relatively straightforward task that can be done by a homeowner with basic plumbing skills. You can purchase a replacement thermocouple from a local hardware store or online.

Evaluating the Pilot Light Assembly

The pilot light assembly consists of the pilot light, its burner, and the pilot light orifice. Over time, these components can become clogged with dust, dirt, or debris, hindering the proper flow of gas and leading to a weak or flickering flame. In severe cases, this can cause the pilot light to go out.

To clean the pilot light assembly, follow these steps:

Turn off the gas supply to the fireplace.
Carefully remove the pilot light assembly from the fireplace.
Use a soft-bristled brush to clean the pilot light burner, the pilot light orifice, and the surrounding area.
Inspect the pilot light for any signs of damage or wear. If the pilot light is damaged, it needs to be replaced.

After cleaning the pilot light assembly, reassemble it and turn the gas supply back on. Try igniting the pilot light and observe if it stays lit.

Addressing Additional Potential Causes

If the pilot light still keeps turning off after checking the gas pressure, thermocouple, and pilot light assembly, consider these additional potential causes:

Draft: A draft can blow out the pilot light. Make sure the fireplace damper is closed when not in use.
Air Pressure: Low air pressure can affect the gas flow and cause the pilot light to go out. Check the air pressure and consult a qualified technician if it's too low.
Faulty Ignition System: If the pilot light is not igniting properly, the ignition system might be faulty. Contact a gas technician to inspect and repair the ignition system.

By systematically troubleshooting these potential causes, you can identify the underlying problem and fix your fireplace pilot light that keeps turning off. Remember, safety is paramount when dealing with gas appliances, so always exercise caution and consult a professional if you are unsure about any step or if the problem persists.