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

A broken furnace is exhausting to put up with. There are several reasons this might happen, but one of the most likely is a problem with the burners or related systems.

Newer furnaces don’t require pilot lights to keep the furnace ignited. Instead, they utilize electronic ignition. If this ignition is damaged, the burners can’t function like they should.

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

    • The thermostat tells your furnace to turn on.
    • Your furnace’s draft inducer fan starts to bring fresh air toward your furnace.
    • The gas valve opens to direct 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 sends gas to the central burners, which are lit by the pilot light.
    • Your furnace then sends warm air into your residence via ductwork.

If something fails during this sequence, your furnace will shut down for safety reasons. Or it might deactivate a few minutes into heating because it’s getting too hot.

Some of these problems can be resolved on their own, but others are best handled by professional assistance. When you are looking for the fastest furnace repair in the U.S., call our heating Experts at . We repair all brands and our service is backed by a 100% Satisfaction Guarantee for a year.*

Here are several of the top reasons why your furnace isn’t staying lit and what to do to fix it.

1. Malfunctioning Flame Sensor

Your furnace’s flame sensor is a safety component that notifies your furnace when gas is ignited. If the sensor is dirty or damaged, it might work intermittently or not at all. Even if the sensor is working like it should, incorrect positioning leaves it unable to sense the flame to begin with. While you could attempt troubleshooting and cleaning this sensor on your own, trusting a professional like Service Experts Heating, Air Conditioning & Plumbing will make sure the problem is resolved promptly and correctly.

2. Furnace is Too Hot

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

3. Thermostat Malfunction

Your thermostat commands your furnace when it should heat your house. When it’s not working normally, your furnace will have trouble keeping your residence warm. This can be a battery or electrical malfunction, depending on what type of thermostat you have. We recommend referring to your owner’s manual or manufacturer’s website for relevant troubleshooting information. If you still can’t get yours working, get in touch with our Experts at . We’ll pinpoint the issue quickly and can replace your thermostat, if necessary.

Some of these issues, like a dirty flame sensor or an overheated furnace, are due to a lack of consistent furnace maintenance. It’s highly beneficial to have this service completed every year, because it could help prevent breakdowns, boost your furnace’s energy efficiency and can even make it survive longer.

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

won’t work like it’s supposed to regardless of 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 work with some of the number one furnace brands, such as Lennox®, to offer you affordable, energy-efficient heating options.

When you’re contemplating 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 receive a new furnace for just one affordable monthly fee. There’s no down payment or installation costs, and you get to hold on to any valuable rebates.

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

Don’t struggle with interruptions to your comfort for a minute longer. Give Service Experts Heating, Air Conditioning & Plumbing a call at to request an appointment now. 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.

Savings For You

See All Offers Here >

$50 OFF Any Repair

  • Save $50 on a Paid Service
  • Written 100% Satisfaction Guarantee
  • Plus, ask how to save an additional 15% and waive your trip charge!

$50 OFF HVAC Tune-up Special

There’s no reason to skip your seasonal maintenance that saves energy and helps ensure your air conditioner and heater will work reliably all season long.

  • Regularly $129, now only $79
  • Save up to 30% on energy bills
  • Written Expert Service Guarantee

© 2023 Service Experts, Service Experts Heating & Air Conditioning, and the Service Experts logo and design are registered trademarks of Service Experts LLC and used under license by SE Canada Inc. All Rights Reserved. *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.