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

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

Newer systems don’t require pilot lights to keep the furnace going. Instead, they use electronic ignition. If this ignition malfunctions, the burners will not function like they should.

When your gas furnace is running correctly, 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 send gas into the pilot burner.
  • An electronic spark starts the pilot light.
  • The flame sensor directs your furnace that the pilot has been ignited.
  • The gas valve transports gas to the central burners, which are lit by the pilot light.
  • Your furnace then sends warm air into your house via ductwork.

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

Some of these issues can be repaired on their own, but others require professional help. When you want the best furnace repair in Sharonville, call our furnace Experts at 859-905-0834. We have experience 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 furnace isn’t staying lit and what to do moving forward.

1. Dirty Flame Sensor

Your furnace’s flame sensor is a safety system that notifies your furnace when gas is ignited. If the sensor is dirty or malfunctioning, it may work inconsistently or not at all. Even if the sensor is operating normally, incorrect positioning leaves it unable to sense the flame at all. While you could try troubleshooting and cleaning this sensor right away, contacting a pro like Knochelmann Service Experts will make sure the problem is resolved promptly and correctly.

2. Furnace is Too Warm

Your furnace utilizes built-in safety functions that deactivates your furnace if it gets dangerously hot. One of the most common causes is a filthy filter. We suggest reviewing your air filter each month. If you can’t see light through it, change it.

3. Thermostat Isn’t Working Right

Your thermostat informs your furnace when it is time to heat your house. When it’s not functioning correctly, your furnace will have trouble keeping your residence warm. This can be a battery or electrical malfunction, depending on what kind of thermostat you have. We encourage reviewing your owner’s manual or manufacturer’s website for necessary troubleshooting instructions. If you still can’t get yours working, reach out to our Experts at 859-905-0834. We’ll identify the cause quickly and can replace your thermostat, if needed.

Some of these issues, including a dirty flame sensor or an overheated furnace, are due to a lack of proper furnace maintenance. It’s important to have this service done once a year, because it can help prevent breakdowns, boost your furnace’s energy efficiency and could even make it last longer.

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

With enough time, your furnace cannot work like it should regardless of attempts to repair or maintain it. When the time comes, call Knochelmann Service Experts and our quality furnace replacement in Sharonville. We work with some of the best furnace brands, such as Lennox®, to offer you affordable, energy-efficient heating options.

When you’re looking into replacing your furnace, consider enrolling in our Advantage Program™. Replacing a furnace can be thousands of dollars out of pocket. As an Advantage member, you’ll get a new furnace for just one low monthly fee. There’s no down payment or installation charges, and you get to keep any valuable 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 receive discounts, no sneaky charges and lots of other benefits.

Don’t worry about interruptions to your comfort for a moment longer. Give Knochelmann Service Experts a call at 859-905-0834 to schedule 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.

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