Is Your Furnace Pilot Light Out? Here’s How to Fix It

Ensure Maximum Furnace Efficiency

A chilling draft and a furnace refusing to cooperate is a homeowner’s nightmare. This often leads to frantic online searches, with many discovering their furnace pilot light is out. This seemingly small issue can disrupt your entire heating system. This guide helps you reignite that flame and restore heat to your home when you are dealing with a furnace pilot light out.

What is a Furnace Pilot Light?

In older gas furnaces, a pilot light is a small, continuous flame. This flame ignites the main burners when the thermostat calls for heat. It’s a constant flame, always ready. Pilot lights are typically located near the furnace’s bottom, behind an access panel.

Not all furnaces have pilot lights. Modern furnaces use electronic ignition systems. These are more energy-efficient, avoiding the constant gas consumption of a standing pilot light. A furnace pilot light out situation in older furnaces can increase your gas bill.

Where Is the Pilot Light on My Furnace?

A furnace pilot light can be tricky to find. It’s usually tucked away for safety. But if your furnace isn’t working, it’s important to know where to look. This often means you’ll have to open a small access panel. This panel is sometimes on the front of your furnace. But it could also be on the bottom. Look for a small, rectangular, or square door. It often has a handle or knob.

Once you open the panel, look for the pilot light assembly. This is usually a small metal tube. It sticks up near the burners. The pilot light itself is a tiny blue flame. It’s at the end of that tube. Sometimes, there’s a sight glass. This makes it easier to see the pilot light without getting too close.

If you can’t find the pilot light, check your furnace’s manual. If you can’t find the manual, don’t worry. You can often find it online. Just search for your furnace’s make and model number. This number is usually on a sticker. Look on the side or back of the furnace. If you still can’t find your pilot light, it’s best to call a professional. A technician from Shipton’s Heating & Cooling can help.

Why is My Furnace Pilot Light Out?

Several factors can cause a furnace pilot to light out. Thermocouple issues, a dirty pilot light assembly, a low gas supply, ventilation problems, or gas valve problems are some possibilities.

A cracked heat exchanger is a more severe issue. Frequent pilot light outages signal underlying problems needing professional HVAC repair. A single instance might be a temporary problem, especially after high winds or inclement weather.

Is It Dangerous if the Pilot Light Goes Out on My Furnace?

A furnace pilot light going out isn’t always a big deal. But sometimes, it can be a safety hazard. So, it’s good to know what to do. A little bit of knowledge can save you a big headache down the road.

If your pilot light goes out, the first thing you should do is turn off the gas supply to your furnace. This is super important for safety.  Next, wait at least five minutes to let any gas dissipate.  This is another important safety step.

Once you’ve waited, you can try to relight the pilot light. Your furnace should have instructions on how to do this. But if you’re not comfortable doing it yourself, you should call a qualified HVAC technician.

So, is a furnace pilot light going out dangerous? Well, it can be. The biggest danger is a gas leak.  If the pilot light is out, gas can build up in your home.  This can lead to a fire or explosion. That’s why you need to make sure the gas is off if the pilot light goes out.

Here are some signs that you might have a gas leak:

• The smell of rotten eggs. This is the scent of the additive they put in natural gas so you can detect it.
• Hissing or whistling sounds near your furnace.
• Feeling dizzy, lightheaded, or nauseous.

If you notice any of these signs, you should leave your house immediately.  And don’t forget to call the gas company or 911 from a safe location.

Regular furnace maintenance is key to preventing problems with your pilot light.  A qualified technician can clean and inspect your furnace to make sure everything is working properly.  This will help keep your furnace running safely and efficiently. And remember, safety is always the most important thing.

Troubleshooting a Furnace Pilot Light Out

Before relighting your pilot light, ensure your thermostat is set to “heat.” This allows your furnace to function correctly. Consult your furnace’s manual for specific instructions for your model number.

Checking the Thermocouple

A thermocouple is a safety device. It shuts off the gas supply if the pilot light goes out. If your furnace won’t ignite or the gas shuts off frequently when lighting, you might have a thermocouple issue. This might require a pump replacement.

Inspecting the Pilot Light Assembly

A dirty pilot light assembly can extinguish the flame. Cleaning the assembly often fixes this common problem. If you have tried relighting the pilot but the furnace pilot light is still out, try checking the assembly.

Verifying Gas Supply and Valve

Ensure your gas supply isn’t low or interrupted. Also, check if the gas valve to the furnace is fully open. These issues could disrupt your gas flame and require replacement gas.

Addressing Ventilation Problems

A draft can extinguish a pilot light. Strong winds or leaks in the ductwork can blow it out, affecting heat distribution throughout your house. Inspect the area around your furnace, including the flue or vent, for any obstructions or leaks.

How to Relight a Furnace Pilot Light

Safety first. If you’re uncomfortable with this process, call a qualified HVAC technician:

1. Turn off the gas supply to the furnace. Locate the gas valve and turn it to the “off” position. Wait five to ten minutes for any residual gas to dissipate. This is a crucial safety step.
2. Locate the pilot light assembly. Consult your furnace’s manual for its location and control knobs. Newer HVAC models might differ from older units. The assembly is usually near the bottom of your furnace.
3. Turn the pilot knob to the “pilot” setting. This allows gas to flow to the assembly for ignition. Some setups have a reset button. Ensure it’s depressed if your assembly has one.
4. Light the pilot. While holding the reset button (or keeping the switch on), use a long lighter or match. Hold the flame to the pilot burner for 30-60 seconds.
5. Observe and adjust. Once lit, release the knob/reset switch. Turn it to the “on” position so the furnace ignites when the thermostat calls for heat. Ensure your pilot flame is working properly.

Maintaining Your Furnace with a Pilot Light

Regular furnace maintenance prevents breakdowns. Professional inspections for heat pumps or other systems are recommended, especially for older models using more natural gas. Consider upgrading your entire assembly for improved efficiency.

Battery-operated carbon monoxide detectors are crucial. They provide early warnings of this odorless, invisible gas. Regularly check these detectors alongside your smoke detectors for proper working order. Maintaining indoor air quality is essential for health and safety.

When to Call a Professional for a Furnace Pilot Light Out

If relighting attempts fail, contact a qualified HVAC technician. Up to 50-70% of an older furnace’s energy consumption can be from the pilot light. If you suspect deeper mechanical issues, consult a professional immediately.

Considering a Furnace Upgrade

A consistently problematic pilot light and high gas bills might warrant a furnace upgrade. Older furnaces, while functional, can be inefficient. Newer gas furnaces, including high-efficiency models, offer several benefits.

These benefits include better indoor air quality, potentially lower bills, more even heating, and modern features. Explore options like a heat pump or electric furnace for enhanced heating and improved indoor air quality.

Conclusion

A furnace piloting out can be frustrating. This guide equips you to troubleshoot and relight your pilot light, addressing common reasons for this issue. While modern furnaces use electronic ignition, older models with pilot lights may need professional help for water heater repair, heater repair, or general HVAC repair.

Whether your pilot light is out, you have a suspected gas supply or valve problem, or you’re experiencing issues with dirty thermocouples affecting your HVAC system, these tips offer guidance. Don’t hesitate to contact a heating professional for assistance with your gas furnace, heat pump replacement, AC replacement, or water heater repair to ensure everything is working properly.