How to Turn on a Pilot Light Furnace: A Quick Step-by-Step Guide to Get Your Furnace Running

Turning on a pilot light furnace is a common household task that many homeowners encounter, especially as temperatures drop and the need for heating arises. A pilot light is a small, continuously burning flame that ignites the burners in your furnace when heat is needed. Relighting it is typically straightforward, but should always be done carefully for safety reasons. Here’s a step-by-step guide to help you turn on a pilot light furnace:

1. Turn Off the Furnace: Locate your furnace’s power switch or set the thermostat to the lowest setting to ensure the furnace is completely off.
2. Find the Pilot Light Assembly: Open the access panel at the base or front of the furnace to locate the pilot light and its control knob, usually labeled “On,” “Off,” and “Pilot.”
3. Turn the Control Knob to “Off”: Wait several minutes to let any residual gas dissipate. This is crucial to avoid accidental ignition.
4. Set the Knob to “Pilot”: Press and hold the knob in this position to begin the flow of gas to the pilot light.
5. Ignite the Pilot: While holding the knob, use a long-reach lighter or match to ignite the pilot light. Continue holding the knob for 30-60 seconds to ensure the thermocouple (a safety device) heats up and the flame stays lit.
6. Release and Set to “On”: Slowly release the knob and check if the pilot stays lit. If it does, turn the knob to the “On” position. Replace the access panel.
7. Turn the Furnace Back On: Switch the furnace power back on or set your thermostat to the desired temperature. The main burners should ignite, and your furnace should begin heating.

As a designer, I know that safety and efficient layouts are critical in every space—furnaces are often tucked away in utility rooms or basements, making accessibility and clear labeling essential. When planning or renovating a utility area, consider how access to equipment like your furnace enables safe maintenance and routine functions, such as lighting the pilot. Digital tools like a room planner can help visualize the best placement for utility systems in relation to your home’s design and usability.

Tips 1:

Regularly check the furnace’s ventilation pathways for obstructions. Adequate airflow ensures optimal combustion, which is not only safer but also prevents unnecessary strain on the system. When designing or rearranging spaces, leave clear, unobstructed access to HVAC appliances.

FAQ

Q: How do I know if my furnace has a pilot light or electronic ignition?

A: Check your owner’s manual or look for a small glass window near the base of the furnace; a pilot assembly usually signals a pilot light, while electronic ignitors don’t have one.

Q: What should I do if the pilot light won’t stay lit?

A: The thermocouple may be faulty or dirty. Try cleaning it gently or consult a professional for replacement.

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

A: Yes, if you follow manufacturer instructions and standard safety precautions. If you smell gas or feel unsure, consult a professional immediately.

Q: Why does my pilot light keep going out?

A: Causes include drafts, a dirty pilot opening, or a malfunctioning thermocouple. Addressing these issues can help maintain a consistent flame.

Q: Should my furnace pilot light always be on?

A: Many older models require a continuously burning pilot, but some newer models ignite only when needed. Refer to your furnace’s manual for specifics.