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

A damaged furnace is tedious to deal with. There are lots of reasons this can happen, but one of the most likely is a problem with the burners or related parts. 

Newer systems don’t count on pilot lights to keep the furnace going. Instead, they work via electronic ignition. If this ignition fails, the burners will not work like they do normally. 

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

  • The thermostat tells your furnace to run. 
  • Your furnace’s draft inducer fan begins to spin in order to pull fresh air toward your furnace. 
  • The gas valve opens to send gas into the pilot burner. 
  • An electronic spark lights the pilot light. 
  • The flame sensor informs your furnace that the pilot has been lit. 
  • The gas valve moves gas to the main burners, which are lit by the pilot light. 
  • Your furnace then transports warm air throughout your home via ductwork. 

If something fails during this procedure, your furnace will stop for safety purposes. Or it might turn off a few minutes into heating because it’s too warm. 

A number of of these problems can be repaired on their own, but others are best handled by professional servicing. When you are looking for the top furnace repair in the U.S., reach out to our heating 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 some of the most common reasons why your heater isn’t staying lit and what to do moving forward. 

1. Dirty Flame Sensor 

Your furnace’s flame sensor is a safety system that informs your furnace when gas is ignited. If the sensor is dirty or faulty, it could work intermittently or not at all. Even if the sensor is functioning normally, incorrect positioning leaves it unable to detect the flame to begin with. While you may start troubleshooting and cleaning this sensor right away, calling a pro like Service Experts Heating, Air Conditioning & Plumbing will guarantee the problem is fixed swiftly and correctly. 

2. Furnace is Too Hot 

Your furnace has built-in safety functions that shut it off if it gets especially hot. One of the most frequent causes is a clogged 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 needs to heat your house. When it’s not running as it’s supposed to, your furnace will have trouble keeping your house warm. This can be a battery or electrical malfunction, depending on what kind of thermostat you have. We suggest reviewing your owner’s manual or manufacturer’s website for useful troubleshooting details. If you still can’t get yours working, reach out to our Experts at 866-397-3787. We’ll find the problem right away and can replace your thermostat, if needed. 

Some of these issues, including a dirty flame sensor or an overheated furnace, are caused by a lack of routine furnace maintenance. It’s extremely helpful to have this service completed annually, because it can help reduce breakdowns, boost your furnace’s energy efficiency and can even make it last longer. 

We Have You In Good Hands When It’s Time for Furnace Replacement 

Sooner or later, your furnace cannot work like it’s supposed to despite attempts to repair or maintain it. When the time comes, consider Service Experts Heating, Air Conditioning & Plumbing and our expert furnace replacement in the U.S.. We partner with some of the top furnace brands, such as Lennox®, to offer you affordable, energy-efficient heating options. 

When you’re contemplating replacing your furnace, consider enrolling in our Advantage Program™. Buying a new furnace can run thousands of dollars out of pocket. As an Advantage member, you’ll receive a new furnace for just one affordable monthly fee. There’s no down payment or installation costs, and you get to keep any beneficial rebates. 

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

Don’t struggle with interruptions to your comfort for a moment longer. Give Service Experts Heating, Air Conditioning & Plumbing a call at 866-397-3787 to schedule an appointment today. Whether you need 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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