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3 Causes Why Your Furnace Isn’t Staying Lit and How to Repair It

A faulty furnace is a hassle to handle. There are lots of reasons this might happen, but one of the most frequent is something wrong with the burners or related components. 

Newer systems don’t rely on pilot lights to keep the furnace lit. Instead, they use electronic ignition. If this ignition is damaged, the burners will not function like they are supposed to. 

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

  • The thermostat directs your furnace to turn on. 
  • Your furnace’s draft inducer fan begins to spin in order to draw fresh air through your furnace. 
  • The gas valve opens to direct gas into the pilot burner. 
  • An electronic spark ignites the pilot light. 
  • The flame sensor informs your furnace that the pilot has been lit. 
  • The gas valve sends gas to the principal burners, which are lit by the pilot light. 
  • Your furnace then sends warm air across your home via ductwork. 

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

Some of these issues can be repaired on their own, but others require professional help. When you need the finest furnace repair in the U.S., call our heat Experts at 866-397-3787. We work with all brands and our service is supported by a 100% Satisfaction Guarantee for a year.* 

Here are a few of the typical reasons why your heating isn’t staying lit and what to do about it. 

1. Dirty Flame Sensor 

Your furnace’s flame sensor is a safety feature that informs your furnace when gas is ignited. If the sensor is dirty or damaged, it might work inconsistently or not at all. Even if the sensor is operating like it should, poor positioning leaves it unable to recognize the flame to begin with. While you can start troubleshooting and cleaning this sensor right away, contacting a pro like Service Experts Heating, Air Conditioning & Plumbing will make sure the problem is taken care of quickly and correctly. 

2. Furnace is Too Hot 

Your furnace utilizes built-in safety functions that force a shutdown if it gets dangerously hot. One of the most frequent causes is a clogged filter. We recommend reviewing your air filter each month. If you can’t see light through it, swap it out. 

3. Thermostat Malfunction 

Your thermostat informs your furnace when it needs to heat your home. When it’s not working properly, your furnace will have trouble keeping your house warm. This can be a battery or electrical problem, depending on what model of thermostat you have. We recommend referring to your owner’s manual or manufacturer’s website for useful troubleshooting information. If you still can’t get yours working, call our Experts at 866-397-3787. We’ll identify the cause swiftly and can replace your thermostat, if that is required. 

Some of these issues, including a dirty flame sensor or an overheated furnace, are due to a lack of proper furnace maintenance. It’s important to have this service completed yearly, because it can help prevent breakdowns, improve your furnace’s energy efficiency and could even make it live longer. 

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

Inevitably, your furnace cannot work like it should in spite of attempts to repair or maintain it. When the time comes, trust Service Experts Heating, Air Conditioning & Plumbing and our top-notch furnace replacement in the U.S.. We offer some of the top furnace brands, such as Lennox®, to offer you affordable, energy-efficient heating systems. 

When you’re thinking about replacing your furnace, consider signing up for our Advantage Program™. Replacing a furnace can cost you thousands of dollars out of pocket. As an Advantage member, you’ll get a new furnace for just one low monthly fee. There’s no down payment or installation charges, and you get to keep any beneficial rebates. 

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

Don’t put up with interruptions to your comfort for a second longer. Give Service Experts Heating, Air Conditioning & Plumbing a call at 866-397-3787 to arrange 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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