Troubleshooting Your Pilot Light: Why It Won't Stay Lit: 1 Minute to Fix Your Pilot Light Issues

If you’ve noticed that your pilot light keeps going out, you’re not alone—this is a common issue with many gas-powered appliances, such as furnaces, water heaters, and fireplaces. The pilot light’s purpose is to ignite the main burner, and if it won’t stay lit, not only will your appliance not work, but there could also be underlying safety issues to address. Let’s walk through common reasons why your pilot light won’t stay lit and how to troubleshoot the problem effectively.

1. Faulty Thermocouple: The thermocouple is a safety device that senses when the pilot light is on and triggers the gas valve to stay open. If it’s misaligned, dirty, or malfunctioning, it may not sense heat properly, causing the gas supply to cut off. Cleaning or replacing the thermocouple is often a simple fix.

2. Dirty Pilot Orifice: Dust, dirt, or debris can clog the small opening (orifice) where the gas is released for the pilot light, resulting in a weak flame that can easily go out. Cleaning this with a needle or compressed air can restore function.

3. Drafts or Ventilation Issues: Strong drafts or improper ventilation in the area around your appliance can blow out the pilot flame. Check for windows, vents, or gaps nearby and try to minimize airflow disturbances.

4. Low Gas Pressure: If the gas pressure is too low, the pilot flame might not be strong enough to stay lit. This is typically a job for a professional who can test and adjust gas pressure as needed.

5. Worn Out Components: Over time, older valves or connections can wear out, leading to gas flow issues that cause the pilot to extinguish. Regular maintenance and part replacement can help prevent this.

As a designer, I’ve encountered numerous cases where outdated gas appliances in a remodel halted progress due to recurring pilot light issues. In many scenarios, upgrading to modern appliances with electronic ignition—not only increases energy efficiency, but can also eliminate persistent pilot light problems. When planning a renovation, integrating features for optimal function and safety in key areas like kitchens and baths becomes crucial. For example, when I advise clients on a kitchen overhaul, I often recommend reviewing all gas appliances and updating as needed. If you’re considering a functional kitchen design, efficient appliance placement and modernized layouts can make a huge difference; using a kitchen layout planner can help visualize the placement for better workflow and safety.

Tips 1:

Always turn off the gas supply before attempting any troubleshooting. If you ever detect a gas smell or continuous pilot problems, call a professional technician immediately for assessment and repair, as safety should always come first.

FAQ

Q: What is a thermocouple, and why does it matter for my pilot light?

A: A thermocouple is a small sensor device that detects whether your pilot flame is on. If it doesn’t sense heat, it shuts off the gas supply as a safety feature.

Q: Can a draft really blow out my pilot light?

A: Yes, drafts from windows, doors, or vents can disrupt the pilot flame and cause it to go out repeatedly.

Q: Is it safe for me to relight my own pilot light?

A: Generally, yes, if you follow the manufacturer’s instructions and ensure there is no smell of gas. If unsure or if the problem persists, call a professional.

Q: What should I do if cleaning doesn’t fix the issue?

A: If cleaning the thermocouple and orifice doesn't resolve the problem, you may have a faulty component or gas pressure issue—a professional HVAC technician should inspect the appliance.

Q: Can I upgrade my old gas appliance to avoid pilot light issues entirely?

A: Upgrading to appliances with electronic ignition systems can eliminate traditional pilot problems and improve both safety and energy efficiency in your home.