How to Safely Light Your Furnace: A Quick Guide to Lighting Your Gas Furnace in MinutesSarah ThompsonMay 26, 2025Table of ContentsStep-by-Step Instructions to Light Your FurnaceSafety PrecautionsMaintenance TipsFAQTable of ContentsStep-by-Step Instructions to Light Your FurnaceSafety PrecautionsMaintenance TipsFAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeLighting your furnace can seem daunting, but with the right safety precautions and steps, you can do it confidently. Follow this guide to ensure your furnace is up and running without hassle.Step-by-Step Instructions to Light Your Furnace1. **Turn Off the Power**: Before you begin, ensure your furnace is completely off. If you have a thermostat, set it to ‘off’ and switch off the power at the circuit breaker.2. **Locate the Furnace Switch**: Find the furnace switch, often located on or near the furnace. It might look like a regular light switch. Flip it to the ‘off’ position.3. **Check the Gas Valve**: Ensure the gas valve is in the 'ON' position. This valve is typically located near the furnace. If it’s turned off, turn it back on.4. **Find the Pilot Light Assembly**: Look for the pilot light assembly; it includes the pilot light itself and the thermocouple. You may need to remove a panel to access it.5. **Light the Pilot**: Use a long lighter or match to ignite the pilot light. Hold the lighter near the pilot opening, and press down on the reset button if your furnace has one. This can take a few moments.6. **Observe the Flame**: Ensure the pilot light stays lit once ignited. If it goes out, wait for a few minutes before trying again to avoid gas buildup.7. **Replace the Cover**: Once the pilot light is stable, replace any panels you removed and turn the power back on by flipping the switch.8. **Test the Thermostat**: Set your thermostat to the desired temperature and listen for your furnace to start. If it does not, check the steps again or contact a professional.Safety PrecautionsAlways prioritize safety when working with gas appliances. If you smell gas or suspect a leak, evacuate the area immediately and contact your gas company or a professional technician.Maintenance TipsRegularly check and clean the pilot light assembly and gas valves to ensure efficient operation. Scheduling annual furnace maintenance with a certified technician can prevent issues and ensure your system runs optimally.FAQWhat should I do if the pilot light won’t stay lit?If the pilot light goes out frequently, it may be due to a faulty thermocouple or gas valve. It’s best to consult a professional technician for a thorough inspection.Can I light the pilot light without turning off the gas?It's essential to turn off the gas before lighting the pilot to prevent gas accumulation and potential hazards.How often should I light my furnace pilot light?You should only light the pilot light when you notice it's gone out. Regular checks during colder months are advisable to ensure proper functioning.Home Design for FreePlease check with customer service before testing new feature.