When your furnace isn’t producing heat, one of the most common issues could be a pilot light that has gone out. This small but essential flame ignites the burners, and without it, your furnace won’t be able to heat your home. Resetting the pilot light is usually a straightforward task, and with a little guidance, you can get your furnace back in working order.
Here’s a friendly, step-by-step guide to help you reset your furnace’s pilot light.
What Is a Pilot Light, and Why Does It Go Out?
The pilot light is a small flame that stays lit to ignite the gas burners in your furnace. If it goes out, it’s usually due to one of these reasons:
- Drafts: A sudden gust of air can blow out the flame.
- Dirt or debris: A clogged pilot tube can disrupt the gas flow.
- Thermocouple issues: A faulty thermocouple may fail to keep the pilot light lit.
- Gas supply interruption: Temporary disruptions in your gas service can extinguish the flame.
Before relighting the pilot light, it’s essential to ensure that the issue isn’t caused by a gas leak or a more significant furnace problem.
Step 1: Safety First
Before you attempt to reset the pilot light, prioritize safety:
- Turn off the furnace: Set the thermostat to “Off” and locate the furnace’s power switch to turn it off.
- Check for gas smells: If you smell gas, do not attempt to relight the pilot light. Open windows, evacuate the home, and call your gas company immediately.
Step 2: Locate the Pilot Light Assembly
The pilot light assembly is typically found near the bottom of the furnace, beneath a removable panel. Look for:
- A gas control knob labeled “Pilot,” “On,” and “Off.”
- The pilot light tube and thermocouple (a safety sensor).
If you’re unsure where to find these components, consult your furnace’s user manual.
Step 3: Turn the Gas Control Knob to “Off”
Locate the gas control knob and turn it to the “Off” position. This stops the flow of gas to the pilot light and allows any residual gas to dissipate. Wait at least 5 minutes before proceeding to ensure the area is safe.
Step 4: Prepare to Relight the Pilot Light
After waiting, turn the gas control knob to the “Pilot” position. This setting allows gas to flow only to the pilot light. Gather your tools:
- A long fireplace match or a long-nosed lighter.
- A flashlight to see the pilot light assembly clearly.
Step 5: Relight the Pilot Light
Now you’re ready to relight the pilot light:
- Press and hold the gas control knob in the “Pilot” position. This opens the gas valve to the pilot light.
- While holding the knob, use a long match or lighter to ignite the pilot light. Place the flame at the end of the pilot tube where the gas flows out.
- Continue holding the gas control knob for 30-60 seconds after the pilot light ignites. This allows the thermocouple to heat up and signal the gas valve to stay open.
Step 6: Turn the Gas Control Knob to “On”
Once the pilot light is lit and stable, release the gas control knob and turn it to the “On” position. Replace the furnace access panel if you removed it earlier.
Step 7: Turn the Furnace Back On
Restore power to the furnace and set your thermostat to the desired temperature. Your furnace should now ignite and begin producing heat.
Troubleshooting Tips
- No Flame After Multiple Attempts: If the pilot light refuses to ignite, check these:
- Gas Supply: Is the gas turned on to your house? Check other gas appliances.
- Valve Position: Double-check that the gas control valve is in the correct positions (“OFF,” “PILOT,” and “ON”) at each step.
- Igniter Function: Is the igniter producing a spark? If not, it may need replacement.
- Clogged Orifice: The small opening in the pilot light tube (the orifice) can sometimes get clogged. Carefully clean it with a thin wire or compressed air (after turning off the gas supply).
- Flame Goes Out After Lighting: If the pilot light ignites but goes out as soon as you release the gas control valve, the thermocouple is likely faulty and needs replacing.
If you’re uncomfortable working with gas appliances or if you’ve tried these steps and the pilot light still won’t light, it’s always best to call a qualified HVAC technician. They have the expertise and tools to diagnose and fix any issues safely and efficiently.
Regular Maintenance to Prevent Pilot Light Issues
To keep your furnace running smoothly and prevent pilot light problems in the future, follow these maintenance tips:
- Schedule annual tune-ups: Professional maintenance can identify and fix potential issues before they become serious.
- Clean your furnace regularly: Dust and debris can interfere with the pilot light and other components.
- Replace air filters: A clean filter improves airflow and reduces strain on your furnace.
Resetting your furnace’s pilot light doesn’t have to be a daunting task. By following these steps and prioritizing safety, you can get your furnace back in working order and keep your home warm and cozy. If in doubt, don’t hesitate to reach out to a professional for help. Stay safe and warm!
