How to Fix a Furnace That Wont Stay Lit

A malfunctioning furnace is a hassle to handle. There are many reasons this might happen, but one of the most frequent is a problem with the burners or associated components.

Newer models don’t count on pilot lights to keep the furnace lit. Instead, they utilize electronic ignition. If this ignition is damaged, the burners will not perform like they do normally.

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

  • The thermostat informs your furnace to activate.
  • Your furnace’s draft inducer fan begins to spin in order to pull fresh air through your furnace.
  • The gas valve opens to direct gas into the pilot burner.
  • An electronic spark lights the pilot light.
  • The flame sensor directs your furnace that the pilot is burning.
  • The gas valve transports gas to the main burners, which are lit by the pilot light.
  • Your furnace then transports warm air across your home via ductwork.

If something malfunctions during this process, your furnace will stop for safety concerns. Or it might shut down a few minutes into heating because it’s overheating.

Some of these malfunctions can be fixed on their own, but others require professional assistance. When you want the fastest furnace repair in Belleville, get in touch with our furnace Experts at 613-707-2421. We work with all brands and our services are backed by a 100% Satisfaction Guarantee for a year.*

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

1. Dirty Flame Sensor

Your furnace’s flame sensor is a safety feature that notifies your furnace when gas is ignited. If the sensor is dirty or damaged, it could work erratically or not at all. Even if the sensor is working as normal, poor positioning leaves it unable to sense the flame at all. While you could start troubleshooting and cleaning this sensor by yourself, hiring a professional like D&K Home Services by Enercare will ensure the problem is handled swiftly and correctly.

2. Furnace is Too Hot

Your furnace has built-in safety functions that shut it off if it gets too hot. One of the most frequent causes is a dirty filter. We suggest inspecting your air filter each month. If you can’t see light through it, replace it.

3. Thermostat Malfunction

Your thermostat tells your furnace when it needs to heat your home. When it’s not operating normally, your furnace will have trouble keeping your residence warm. This can be a battery or electrical issue, depending on what kind of thermostat you have. We encourage checking your owner’s manual or manufacturer’s website for specific troubleshooting instructions. If you still can’t get yours working, reach out to our Experts at 613-707-2421. We’ll pinpoint the cause swiftly and can replace your thermostat, if that is required.

A number of these issues, such as a dirty flame sensor or an overheated furnace, are due to a lack of proper furnace maintenance. It’s highly beneficial to have this service done once a year, because it can help prevent breakdowns, improve 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

Sooner or later, your furnace won’t work like it used to in spite of attempts to repair or maintain it. When the time comes, consider D&K Home Services by Enercare and our professional furnace replacement in Belleville. We offer some of the best furnace brands, such as Lennox®, to offer you affordable, energy-efficient heating equipment.

When you’re looking into replacing your furnace, consider taking advantage of 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 keep any helpful 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 enjoy discounts, no last-minute charges and lots of other benefits.

Don’t struggle with interruptions to your comfort for a minute longer. Give D&K Home Services by Enercare a call at 613-707-2421 to arrange 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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