3 Reasons Why Your Furnace Isn’t Staying Lit and How to Fix It

A faulty furnace is tedious to handle. There are many reasons this may happen, but one of the most common is an issue with the burners or associated systems. 

Newer furnaces don’t require pilot lights to keep the furnace lit. Instead, they utilize electronic ignition. If this ignition stops working correctly, the burners won’t function like they should. 

When your gas furnace is performing normally, here’s how it should work: 

  • The thermostat tells your furnace to run. 
  • Your furnace’s draft inducer fan turns on to draw fresh air through your furnace. 
  • The gas valve opens to direct gas into the pilot burner. 
  • An electronic spark starts the pilot light. 
  • The flame sensor directs your furnace that the pilot has been ignited. 
  • The gas valve sends gas to the central burners, which are lit by the pilot light. 
  • Your furnace then pushes warm air across your residence via ductwork. 

If something malfunctions during this process, your furnace will turn off for safety purposes. Or it might shut down a few minutes into heating because it’s overheating. 

Several of these problems can be handled on their own, but others are best handled by professional help. When you are looking for the fastest furnace repair in the U.S., call our heating Experts at 866-397-3787. We have experience with all brands and our work is supported by a 100% Satisfaction Guarantee for a year.* 

Here are several of the most common reasons why your furnace isn’t staying lit and what to do moving forward. 

1. Malfunctioning Flame Sensor 

Your furnace’s flame sensor is a safety system that tells your furnace when gas is ignited. If the sensor is dirty or malfunctioning, it might work erratically or not at all. Even if the sensor is operating as normal, poor positioning leaves it unable to detect the flame to begin with. While you may try troubleshooting and cleaning this sensor right away, calling a pro like Service Experts Heating, Air Conditioning & Plumbing will make sure the problem is resolved swiftly and correctly. 

2. Furnace is Too Warm 

Your furnace has built-in safety procedures that shut it off if it gets too hot. One of the most frequent causes is a filthy filter. We encourage inspecting your air filter each month. If you can’t see light through it, swap it out. 

3. Thermostat Isn’t Working Right 

Your thermostat directs your furnace when it should heat your home. When it’s not running like it should, your furnace will require more energy to keep your residence warm. This can be a battery or electrical problem, depending on what kind of thermostat you use. We encourage reviewing your owner’s manual or manufacturer’s website for necessary troubleshooting information. If you still can’t get yours working, get in touch with our Experts at 866-397-3787. We’ll find the cause swiftly and can replace your thermostat, if needed. 

Some of these issues, like a dirty flame sensor or an overheated furnace, are due to a lack of consistent furnace maintenance. It’s vital to have this service done yearly, because it may help prevent breakdowns, boost your furnace’s energy efficiency and may even make it last longer. 

We Have You Protected When It’s Time for Furnace Replacement 

Inevitably, your furnace won’t work like it should regardless of attempts to repair or maintain it. When the time comes, call Service Experts Heating, Air Conditioning & Plumbing and our top-notch furnace replacement in the U.S.. We work with some of the number one furnace brands, including Lennox®, to offer you affordable, energy-efficient heating equipment. 

When you’re looking into replacing your furnace, consider taking advantage of our Advantage Program™. Replacing a furnace can be thousands of dollars out of pocket. As an Advantage member, you’ll be given a new furnace for just one low monthly fee. There’s no down payment or installation expenses, and you get to keep any helpful rebates. 

What’s even better is that Advantage members don’t pay a cent for repairs** or maintenance. If you have a disaster, you’re guaranteed a fast response with 24/7 priority service. You’ll also enjoy discounts, no last-minute charges and many other benefits. 

Don’t struggle with interruptions to your comfort for a second longer. Give Service Experts Heating, Air Conditioning & Plumbing a call at 866-397-3787 to request an appointment today. Whether you want repairs or if it’s time for a new furnace, we guarantee your satisfaction. 


*Not applicable to the Advantage Program. See your signed Advantage Program agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions. **See your signed Advantage Agreement for details. 

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