Why Does My Furnace Pilot Light Keep Going Out?: 1 Minute to Understand Common Issues and Solutions

If your furnace pilot light keeps going out, it can be both frustrating and concerning, especially during colder months. As a homeowner, understanding the root causes can help you address the issue promptly and maintain a comfortable environment. There are several common reasons why your furnace’s pilot light may repeatedly go out:

1. Faulty Thermocouple: The thermocouple is a safety device that senses if the pilot light is lit. If it's malfunctioning or dirty, it might mistakenly shut off the gas supply even when the flame is present.
2. Dirty Pilot Opening: Over time, dust and debris can accumulate in the pilot light’s orifice, restricting gas flow and preventing the pilot from staying lit.
3. Drafts: Drafts near your furnace, possibly from open windows, doors, or nearby vents, can blow out the pilot light.
4. Gas Supply Issues: Low gas pressure or interruptions in the gas supply can cause the pilot to go out. This often requires a professional to inspect.
5. Faulty Control Valve: If the gas valve itself is malfunctioning, it might intermittently shut off gas to the pilot light.

From a designer’s perspective, maintaining your HVAC equipment not only ensures a functional living space but also supports other aspects of your home’s interior. For instance, a well-maintained heating system helps preserve the integrity of your home’s interior design elements by preventing moisture buildup and uneven temperatures, which can lead to issues like wall warping or floor damage. Prioritizing these details ensures both comfort and the longevity of your designed spaces.

Tips 1:

If your pilot light continues to go out despite cleaning and relighting attempts, it’s best to call a qualified HVAC technician. They can inspect components like the thermocouple and gas valve, and also make recommendations to keep your system—and your designed spaces—functioning at their best.

FAQ

Q: Why does my pilot light keep going out after I relight it?

A: This is often due to a faulty or dirty thermocouple, or issues with gas flow. It’s a safety mechanism to prevent gas leaks.

Q: Can a draft cause my furnace’s pilot light to go out?

A: Yes, drafts from open windows, doors, or nearby vents can extinguish the pilot flame.

Q: How do I know if the thermocouple is the problem?

A: If you hold down the pilot button and the light stays on but goes out when you release it, the thermocouple may be at fault.

Q: Is it safe to relight the pilot light myself?

A: Generally, yes, if you follow the manufacturer’s instructions. If it repeatedly goes out, contact a professional.

Q: Why is maintaining the furnace important for my home’s interior design?

A: Consistent, reliable heating helps protect surfaces, furnishings, and architectural details from moisture and temperature damage.