Where to Find the Pilot Light in Your Furnace: Your Quick Guide to Locating the Pilot Light

Locating the pilot light in your furnace is an important first step for both troubleshooting and routine maintenance. Most residential furnaces, especially older gas models, use a pilot light as a small, continuous flame that ignites the main burners when the thermostat calls for heat. To find the pilot light, first turn off the furnace and let it cool if it's been running. Usually, the access panel on the front or side of the furnace can be removed either by unscrewing it or simply sliding it off. Once the panel is open, look for a small metal tube that leads to the burner assembly—you’ll generally find the pilot light in this area. It’s often located near the bottom of the furnace, underneath or behind the main burners, and you may notice it has a gas valve with settings labeled “ON,” “OFF,” and “PILOT.” Some modern furnaces have electronic ignition instead of a traditional pilot light, so refer to your furnace’s manual for your exact model.

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FAQ

Q: What does the pilot light do in a furnace?

A: The pilot light ignites the furnace’s main burners, allowing the furnace to produce heat when needed.

Q: How can I tell if my furnace has a pilot light or electronic ignition?

A: Check your owner’s manual or look for a small flame or a gas control knob labeled “pilot.” Newer furnaces often use electronic ignition instead.

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

A: Yes, if you follow the manufacturer’s instructions. If you smell gas or feel uncomfortable, call a professional.

Q: Where exactly is the pilot light located?

A: It is generally beneath or behind the burner assembly, at the bottom of the furnace, near the gas valve.

Q: Why does my pilot light keep going out?

A: Possible causes include a faulty thermocouple, dirty pilot opening, or draft issues. Contact a technician if it happens repeatedly.