3 Causes Why Your Furnace Isnt Staying Lit and How to Fix It

A broken furnace is tedious to deal with. There are lots of reasons this can happen, but one of the most common is something wrong with the burners or related systems.

Newer models don’t rely on pilot lights to keep the furnace going. Instead, they work via electronic ignition. If this ignition stops working correctly, the burners will not work like they are supposed to.

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

  • The thermostat directs your furnace to turn on.
  • Your furnace’s draft inducer fan turns on 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 tells your furnace that the pilot has been lit.
  • The gas valve moves gas to the principal burners, which are lit by the pilot light.
  • Your furnace then provides warm air into your residence via ductwork.

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

Several of these issues can be fixed on their own, but others need professional help. When you are looking for the finest furnace repair in Toronto, contact our furnace Experts at 289-201-2346. We repair all brands and our work is supported 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 about it.

1. Malfunctioning Flame Sensor

Your furnace’s flame sensor is a safety component that informs your furnace when gas is ignited. If the sensor is dirty or faulty, it might work erratically or not at all. Even if the sensor is operating normally, incorrect positioning leaves it unable to sense the flame entirely. While you can start troubleshooting and cleaning this sensor right away, contacting a pro like Service Experts Commercial HVAC will ensure the problem is handled swiftly and correctly.

2. Furnace is Too Warm

Your furnace contains built-in safety features that deactivates your furnace if it gets dangerously hot. One of the most typical causes is a clogged filter. We encourage evaluating your air filter monthly. If you can’t see light through it, replace it.

3. Thermostat Isn’t Working Right

Your thermostat informs your furnace when it should heat your home. When it’s not working properly, your furnace will have trouble keeping your home warm. This can be a battery or electrical problem, depending on what type of thermostat you have. We suggest reviewing your owner’s manual or manufacturer’s website for relevant troubleshooting procedures. If you still can’t get yours working, get in touch with our Experts at 289-201-2346. We’ll uncover the problem right away and can replace your thermostat, if needed.

Several of these issues, like a dirty flame sensor or an overheated furnace, are caused by a lack of proper furnace maintenance. It’s crucial to have this service performed every year, because it may help stop breakdowns, enhance your furnace’s energy efficiency and might even make it live longer.

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

Inevitably, your furnace won’t work like it’s supposed to in spite of attempts to repair or maintain it. When the time comes, consider Service Experts Commercial HVAC and our excellent furnace replacement in Toronto. We offer some of the number one furnace brands, like Lennox®, to offer you affordable, energy-efficient heating equipment.

When you’re contemplating replacing your furnace, consider signing up for our Advantage Program™. Getting a new furnace can be 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 helpful rebates.

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

Don’t fret about interruptions to your comfort for a minute longer. Give Service Experts Commercial HVAC a call at 289-201-2346 to arrange 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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