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HVAC Repair Service

Test and Fix Furnace Flame Sensor Problems

If your gas furnace isn't working. It could be because the flame sensor isn't working. The flame sensor gives a signal to your furnace that there is in fact a flame. It is a safety mechanism designed to protect you and your home. Our vetted HVAC Pros know how to diagnose and fix a flame sensor that isn't working.

What to expect when fixing your furnace flame sensor

The Logistics

After making initial contact, we will connect you with one of our vetted HVAC Pros in your area. Each pro is vetted for technical knowledge, and customer service skills.

Next, we will arrange a time to perform the service that is convenient for you.

Replacing or fixing a gas furnace flame sensor is a quick process that usually takes around 15-20 minutes.

Payment is made directly to the HVAC Pro.

The Work

Assuming the flame sensor has already been diagnosed as faulty, replacing or fixing the gas furnace flame sensor is straight-forward.

If the flame sensor is faulty, meaning it isn't signaling to the control board that a flame is sensed. It should be replaced or cleaned.

First, the HVAC Pro needs to access the flame sensor which is located near the gas burners inside of the gas furnace.

The gas furnace is usually located in the attic, crawlspace, basement, or closet of a home.

Before replacing the flame sensor, the HVAC Pro will clean the metal rod that comes into contact with the flame. And will test if it works again. The metal rod oftentimes accumulates mineral build up on it, that prevents it from sensing the flame.

If it still fails to pass a signal to the control board, it should be replaced.

Once it is replaced the system should be checked to make sure the flame sensor is operating correctly.

Important things to know

There are many makes and models for HVAC equipment. Each make and model has unique internal components including the flame sensor. 

Consider sharing the make and model of your system with the HVAC Pro to ensure they have the parts needed to fix the problem on the spot. 

Otherwise they may need to order the part. And come back another time to replace the flame sensor.

You may also want to consider getting a complete system diagnosis. Often times, there are other underlying problems that should be addressed.

Connect with a HVAC Pro
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