Why You Should Never Try to Relight a Stubborn Furnace Pilot Light Yourself
A stubborn furnace pilot light is more than an inconvenience. It is a potential safety hazard that can lead to gas leaks, carbon monoxide exposure, and even fire. In Buffalo’s cold climate, where furnaces run for months on end, a pilot light that keeps going out signals an underlying problem that needs professional attention. This article explains the risks of DIY relighting, the common causes of pilot light failures, and when to call a certified HVAC technician. Emergency Furnace Repair in Amherst When Your Heat Goes Out at Night.
How a Furnace Pilot Light Works
A standing pilot light is a small, continuously burning flame that ignites the main burners when your thermostat calls for heat. The system includes a thermocouple, a safety device that senses the pilot flame. If the flame goes out, the thermocouple shuts off the gas valve to prevent unburned gas from accumulating. Modern furnaces often use electronic ignition instead of a standing pilot, but both systems require proper maintenance and safe operation.. Read more about Is it Better to Pay for a Monthly HVAC Maintenance Plan or Just Call When Something Breaks?.
Is a Pilot Light Going Out Dangerous?
Yes. A pilot light that repeatedly goes out can indicate a gas leak or a cracked heat exchanger, both of which pose serious health and safety risks. According to the U.S. Consumer Product Safety Commission, carbon monoxide poisoning kills more than 400 Americans each year, and faulty heating equipment is a leading cause. If you smell gas, hear hissing near the furnace, or experience symptoms like headaches, dizziness, or nausea, leave the house immediately and call your gas company from outside. U.S. Consumer Product Safety Commission.
5 Common Reasons Your Pilot Light Keeps Going Out
Understanding why your pilot light fails can help you recognize when professional help is needed. Here are the five most common causes:
- Dirty or clogged pilot orifice – Dust, rust, or debris can block the tiny opening, causing a weak or unstable flame.
- Faulty thermocouple – A worn or misaligned thermocouple may fail to detect the flame, shutting off gas flow unnecessarily.
- Draft or ventilation issues – Poor venting, blocked flue pipes, or negative air pressure can blow out the pilot.
- Gas supply problems – Low gas pressure or a partially closed gas valve can prevent the pilot from staying lit.
- Heat exchanger cracks – A cracked heat exchanger can cause flame rollout, a dangerous condition where flames escape the combustion chamber.
Step-by-Step: How to Safely Relight Your Furnace Pilot
If your furnace has a manual pilot light and you’re certain there is no gas leak, follow these steps carefully. If at any point you smell gas, hear hissing, or feel unsure, stop immediately and call a professional.
- Turn the thermostat off – Set it to the lowest temperature and wait five minutes for any residual gas to clear.
- Locate the gas valve – Find the knob marked “Pilot,” “On,” and “Off.” Turn it to “Off” and wait another five minutes.
- Set to pilot – Turn the knob to “Pilot” and press it down to start gas flow.
- Light the pilot – Hold a long lighter or match to the pilot opening while keeping the knob pressed. Some furnaces have a red reset button next to the valve.
- Hold for 30 seconds – Keep the knob pressed for at least 30 seconds after the flame lights to allow the thermocouple to warm up.
- Release and observe – Slowly release the knob. If the pilot stays lit, turn the valve to “On.” If it goes out again, do not repeat the process. Call a technician.
When to Call a Buffalo HVAC Expert
DIY relighting is only safe if the pilot goes out once and you can relight it without issue. If the flame won’t stay lit, if you smell gas, or if the furnace makes unusual noises, it’s time to call a professional. In Buffalo, where winter temperatures can drop below zero and lake-effect snow can block vents, a malfunctioning furnace is an emergency. HVAC Buffalo.
United HVAC Buffalo offers 24/7 emergency service throughout Erie County, including Amherst, Orchard Park, and Tonawanda. Our NATE-certified technicians carry the tools and parts to diagnose and repair pilot light issues safely. We also perform combustion analysis to check for carbon monoxide leaks and ensure your system meets all local mechanical codes. Orchard Park Homeowners’ Guide to Replacing an Aging Heat Pump.
Safety Checklist: Before You Attempt to Relight
- Have you smelled gas or heard hissing? STOP – leave the house and call your gas company.
- Is your furnace more than 15 years old? Older units are more prone to heat exchanger cracks.
- Do you have a carbon monoxide detector installed near your bedrooms? If not, install one immediately.
- Have you scheduled annual maintenance? Regular tune-ups prevent most pilot light failures.
Buffalo’s Climate Makes Furnace Safety Critical
Buffalo’s harsh winters put extra stress on heating systems. High humidity in summer can cause corrosion in pilot assemblies, while rapid freeze-thaw cycles can damage venting. Homes in older neighborhoods like Allentown or the West Side often have aging furnaces that lack modern safety features. If your pilot light keeps going out, it’s not just an inconvenience—it’s a warning sign that your system may be failing.
Frequently Asked Questions
Can I relight my pilot light if I smell a faint gas odor?
No. Any gas smell is a sign of a potential leak. Leave the area, avoid creating sparks, and call your gas company or emergency services immediately.
How often should I have my furnace inspected?
The National Fire Protection Association recommends annual inspections for all fuel-burning appliances. In Buffalo, scheduling a fall checkup ensures your system is ready for winter. National Fire Protection Association.
What is the difference between a standing pilot and electronic ignition?
A standing pilot burns continuously, while electronic ignition lights the burners only when heat is needed. Electronic systems are more efficient and less prone to pilot outages, but both require professional maintenance.
Conclusion
A stubborn furnace pilot light is a serious safety issue that should never be ignored. While relighting a pilot once may be safe, repeated outages signal a deeper problem that only a certified technician can fix. In Buffalo’s extreme climate, a reliable heating system is essential for your family’s comfort and safety. Don’t risk carbon monoxide poisoning or a gas explosion—call United HVAC Buffalo at (716) 317-7757 for fast, professional service. Finding the Most Reliable Furnace Repair Services in Buffalo.
Call (716) 317-7757 today to schedule your inspection.
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