Scheduling your annual furnace maintenance helps keep your heating system operating up to 30% more efficient and helps extend the life of your furnace. But things may still go wrong, and when they do, you may feel like you’re always hearing about something else.
This time it’s your blower, next time it’s your control board. Now you need to replace your flame sensor.
A flame sensor is an important safety feature on your gas heating system. During the ignition sequence, your gas furnace goes through a process where a spark or a hot surface ignitor actually ignites the gas. When the gas is ignited, the flame sensor creates a current of electricity. This is measured in micro amps. If the furnace’s control board does not read the right level of micro amps, the furnace will stop giving the system fuel to prevent an explosion.
Over time, if the flame sensor is not cleaned appropriately, oxidation or carbon buildup can interfere with the flame sensor’s ability to work properly, which can result in a malfunction of the furnace.
The way to establish if a dirty flame sensor is to blame for a furnace malfunction is to take a micro amp draw reading, which a professional furnace technician can provide you. If a dirty flame sensor is the culprit, the technician will clean the sensor with steel wool. If dirt was the single factor, we will see a much higher amp reading. If the reading shows no change, the technician will proceed with the heating system repair diagnostic process.
If you aren’t certain your heating system is going to make it through these last few weeks of winter, give Wesley Wood Service Experts a call and we’ll come out and perform a full furnace maintenance or a free in-home estimate on a new heating system.
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