How to Troubleshoot a Furnace That Wont Stay Lit

A damaged furnace is tedious to put up with. There are many reasons this can happen, but one of the most frequent is a problem with the burners or associated systems.

Newer models don’t require pilot lights to keep the furnace going. Instead, they use electronic ignition. If this ignition stops working correctly, the burners will not perform like they do normally.

When your gas furnace is performing normally, here’s how it should run:

  • The thermostat tells your furnace to activate.
  • Your furnace’s draft inducer fan starts to draw fresh air into 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 is burning.
  • The gas valve sends gas to the central burners, which are lit by the pilot light.
  • Your furnace then distributes warm air throughout your house via ductwork.

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

Several of these problems can be repaired on their own, but others are best handled by professional servicing. When you are looking for the fastest furnace repair in Rochester, reach out to our heating Experts at 603-923-4570. We work with all brands and our service is ensured by a 100% Satisfaction Guarantee for a year.*

Here are some of the most common reasons why your furnace isn’t staying lit and what to do about it.

1. Malfunctioning Flame Sensor

Your furnace’s flame sensor is a safety system that tells your furnace when gas is ignited. If the sensor is dirty or damaged, it might work erratically or not at all. Even if the sensor is working like it should, misaligned positioning leaves it unable to recognize the flame at all. While you may attempt troubleshooting and cleaning this sensor by yourself, calling an expert like Strogen's Service Experts will ensure the problem is resolved swiftly and correctly.

2. Overheated Furnace

Your furnace has built-in safety features that deactivates your furnace if it gets especially hot. One of the most typical causes is a filthy filter. We suggest reviewing your air filter every month. If you can’t see light through it, change it.

3. Thermostat Isn’t Working Right

Your thermostat directs your furnace when it should heat your house. When it’s not running normally, your furnace will require more energy to keep your residence warm. This can be a battery or electrical issue, depending on what kind of thermostat you use. We encourage checking your owner’s manual or manufacturer’s website for needed troubleshooting procedures. If you still can’t get yours working, contact our Experts at 603-923-4570. We’ll find the cause quickly and can replace your thermostat, if necessary.

Several of these issues, including a dirty flame sensor or an overheated furnace, are caused by a lack of consistent furnace maintenance. It’s important to have this service done every year, because it can help prevent breakdowns, improve your furnace’s energy efficiency and could even make it live longer.

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

With enough time, your furnace can’t work like it should regardless of attempts to repair or maintain it. When the time comes, consider Strogen's Service Experts and our expert furnace replacement in Rochester. We partner with some of the number one furnace brands, like Lennox®, to offer you affordable, energy-efficient heating equipment.

When you’re looking into replacing your furnace, consider taking advantage of our Advantage Program™. Getting a new furnace can run 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 pocket any valuable rebates.

What’s even better is that Advantage members don’t pay a dime for repairs** or maintenance. If you have a disaster, you’re supported with 24/7 priority service. You’ll also receive discounts, no last-minute charges and many other benefits.

Don’t struggle with interruptions to your comfort for a moment longer. Give Strogen's Service Experts a call at 603-923-4570 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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