Repairing a Furnace That Wont Stay Lit

A malfunctioning furnace is frustrating to deal with. There are lots of reasons this might happen, but one of the most frequent is something wrong with the burners or relevant parts.

Newer models don’t count on pilot lights to keep the furnace ignited. Instead, they use electronic ignition. If this ignition is damaged, the burners can’t perform like they should.

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

  • The thermostat directs your furnace to run.
  • Your furnace’s draft inducer fan turns on to draw fresh air through your furnace.
  • The gas valve opens to move gas into the pilot burner.
  • An electronic spark starts the pilot light.
  • The flame sensor directs 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 moves warm air across your home via ductwork.

If something fails during this sequence, your furnace will turn off for safety concerns. Or it might deactivate a few minutes into heating because it’s overheating.

Several of these issues can be fixed on their own, but others need professional assistance. When you want the best furnace repair in Calgary, reach out to our heat Experts at 403-279-5760. We work with all brands and our service is backed by a 100% Satisfaction Guarantee for a year.*

Here are some of the top 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 faulty, it may work intermittently or not at all. Even if the sensor is functioning normally, misaligned positioning leaves it unable to identify the flame entirely. While you may attempt troubleshooting and cleaning this sensor by yourself, trusting a pro like Service Experts Heating & Air Conditioning will make sure the problem is fixed quickly and correctly.

2. Furnace is Too Warm

Your furnace has built-in safety procedures that shut it off if it gets dangerously hot. One of the most common causes is a dirty filter. We recommend reviewing your air filter every month. If you can’t see light through it, replace it.

3. Thermostat is Malfunctioning

Your thermostat informs your furnace when it needs to heat your house. When it’s not working like it should, your furnace will require more energy to keep your house warm. This can be a battery or electrical issue, depending on what type of thermostat you own. We encourage opening your owner’s manual or manufacturer’s website for required troubleshooting info. If you still can’t get yours working, contact our Experts at 403-279-5760. We’ll pinpoint the problem swiftly and can replace your thermostat, if that is required.

Several of these issues, like a dirty flame sensor or an overheated furnace, are due to a lack of consistent furnace maintenance. It’s crucial to have this service done once a year, because it may help reduce breakdowns, increase your furnace’s energy efficiency and might even make it survive longer.

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

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

When you’re looking into replacing your furnace, consider taking advantage of our Advantage Program™. Buying a new furnace can run thousands of dollars out of pocket. As an Advantage member, you’ll get a new furnace for just one small monthly fee. There’s no down payment or installation expenses, 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 protected with 24/7 priority service. You’ll also enjoy discounts, no hidden charges and lots of other benefits.

Don’t worry about interruptions to your comfort for a second longer. Give Service Experts Heating & Air Conditioning a call at 403-279-5760 to request an appointment right away. 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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