pilot light wont stay lit on gas water heater

Troubleshooting a Pilot Light That Won’t Stay Lit

A pilot light that won’t stay lit on your gas water heater can be a frustrating problem. Here’s a step-by-step guide to help you diagnose and potentially fix the issue.

Check the Gas Supply

The most common reason for a pilot light that won’t stay lit is a lack of gas supply. Start by checking the gas valve to your water heater. Ensure it’s turned to the “on” position. If it’s already on, try turning it off and back on again to reset the flow. If the valve is on and you still don’t have gas flow, there could be a problem with the gas line itself. Check for any kinks, leaks, or blockages in the line. If you suspect a leak, immediately shut off the gas supply to your water heater and call a qualified plumber for assistance. It’s essential to address any gas leaks promptly to prevent potential hazards.

Inspect the Thermocouple

The thermocouple is a safety device that senses the flame of the pilot light and keeps the gas valve open. If the thermocouple is dirty, damaged, or not working properly, it won’t be able to sense the flame, causing the gas valve to shut off. To inspect the thermocouple, locate it near the pilot light. It’s a small, metal rod with a wire attached. Check for any signs of corrosion, damage, or debris. If it’s dirty, carefully clean it with a wire brush. If it’s damaged, it will need to be replaced. You can test the thermocouple by holding a lit match to the end of the rod. If the gas valve stays open, the thermocouple is working properly. If it shuts off, the thermocouple needs to be replaced.

Examine the Pilot Assembly

The pilot assembly is the part of the water heater that houses the pilot light, the thermocouple, and the gas valve. If the pilot assembly is dirty or damaged, it can cause the pilot light to go out. To examine the pilot assembly, carefully remove the cover that protects it. Inspect the pilot light for any signs of blockage or damage. Also, check the gas valve for any signs of corrosion or leaks. If the pilot light is blocked, you can try to clean it with a small wire brush. If the gas valve is leaking, you’ll need to replace it. If the pilot assembly is severely damaged, it may need to be replaced entirely. When working on the pilot assembly, always be careful to avoid touching the gas lines or the thermocouple.

Clean the Burner and Venturi

A dirty burner and venturi can also prevent the pilot light from staying lit. The burner is the part of the water heater that burns the gas, and the venturi is the small tube that mixes the gas with air. Over time, these parts can become clogged with dirt and debris. To clean the burner and venturi, first turn off the gas supply to the water heater. Then, remove the burner and venturi and carefully clean them with a wire brush or a vacuum cleaner with a brush attachment. Be sure to remove any dirt or debris from the venturi tube. Once the burner and venturi are clean, reassemble them and turn the gas supply back on. If the pilot light still won’t stay lit, you may need to replace the burner or venturi.

Call a Professional

If you’ve tried all of the above steps and the pilot light still won’t stay lit, it’s time to call a professional. A qualified technician can diagnose the problem and make the necessary repairs. They will have the tools and expertise to safely and efficiently fix your water heater. Attempting to repair a gas water heater yourself can be dangerous, so it’s best to leave it to the professionals. A professional can also inspect your water heater for other potential problems, such as a gas leak or a faulty thermostat. This can help prevent future problems and ensure the safety of your home.