Setting up your annual furnace maintenance helps keep your heating system operating up to 30% more efficient and helps extend the life of the equipment. 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 heat exchanger, next time it’s your control board. Now you need to replace your flame sensor.
A flame sensor is an important safety component on your gas furnace. During the ignition cycle, your gas furnace enters a process where either a spark or a hot surface igniter actually ignites the gas. As the gas is ignited, the flame sensor creates a current of electricity. This is calculated in micro amps. If the furnace’s control board does not read the correct level of micro amps, the furnace will stop giving the system fuel to stop an explosion.
Over time, if the flame sensor is not cleaned properly, oxidation or carbon buildup can interfere with the flame sensor’s ability to function properly, which can result in a malfunction of the furnace.
The way to determine if an unclean flame sensor is to blame for a furnace malfunction is to take a micro amp draw reading, which an expert heating 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 only factor, we will see a notably higher amp reading. If the reading does not change, the technician will carry on with the furnace repair diagnostic process.
If you aren’t certain your furnace is going to survivie these last few weeks of winter, give Fras-Air/General Service Experts a call and we’ll come out and provide you with a full furnace maintenance or a free in-home estimate on a new furnace.
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