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

A damaged furnace is tedious to put up with. There are several reasons this might happen, but one of the most likely is an issue with the burners or relevant components. 

Newer furnaces don’t use pilot lights to keep the furnace ignited. Instead, they work via electronic ignition. If this ignition fails, the burners won’t function like they do normally. 

When your gas furnace is functioning correctly, here’s how it should operate: 

  • The thermostat tells your furnace to turn on. 
  • Your furnace’s draft inducer fan turns on to bring fresh air through your furnace. 
  • The gas valve opens to send gas into the pilot burner. 
  • An electronic spark starts the pilot light. 
  • The flame sensor directs your furnace that the pilot is burning. 
  • The gas valve directs gas to the primary burners, which are lit by the pilot light. 
  • Your furnace then transports warm air into your residence via ductwork. 

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

Some of these issues can be repaired on their own, but others are best handled by professional assistance. When you need the fastest furnace repair in the U.S., reach out to our heating Experts at 866-397-3787. We work with all brands and our services are backed by a 100% Satisfaction Guarantee for a year.* 

Here are some of the main reasons why your heating isn’t staying lit and what to do to fix it. 

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 damaged, it might work inconsistently or not at all. Even if the sensor is functioning as normal, misaligned positioning leaves it unable to sense the flame at all. While you may start troubleshooting and cleaning this sensor by yourself, contacting a professional like Service Experts Heating, Air Conditioning & Plumbing will make sure the problem is fixed swiftly and correctly. 

2. Overheated Furnace 

Your furnace has built-in safety procedures that deactivates your furnace if it gets especially hot. One of the most frequent causes is a clogged filter. We suggest reviewing your air filter every month. If you can’t see light through it, replace it. 

3. Thermostat is Malfunctioning 

Your thermostat tells your furnace when it should heat your residence. When it’s not operating like it should, your furnace will have trouble keeping your residence warm. This can be a battery or electrical issue, depending on what model of thermostat you use. We encourage opening your owner’s manual or manufacturer’s website for needed troubleshooting instructions. If you still can’t get yours working, contact our Experts at 866-397-3787. We’ll uncover the problem swiftly and can replace your thermostat, if necessary. 

Some of these issues, including a dirty flame sensor or an overheated furnace, are due to a lack of routine furnace maintenance. It’s important to have this service performed yearly, because it might help stop breakdowns, increase your furnace’s energy efficiency and may even make it survive longer. 

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

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

When you’re considering replacing your furnace, consider taking advantage of our Advantage Program™. Replacing a furnace can run 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 costs, and you get to hold on to any beneficial 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 receive discounts, no hidden charges and lots of other benefits. 

Don’t put up with interruptions to your comfort for a minute longer. Give Service Experts Heating, Air Conditioning & Plumbing a call at 866-397-3787 to request an appointment right away. Whether you are looking for 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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