Receiving your annual furnace maintenance helps keep your heating equipment working up to 30% more efficient and helps extend the life of the equipment. But things may still go wrong, and when they do, you might feel like you’re always hearing about something else.
This time it’s your motor, next time it’s your control valve. Now your find out the flame sensor has to be replaced.
By the way – what is a flame sensor?
A flame sensor is a crucial safety component on your gas furnace. During the ignition pattern, your gas furnace undergoes a process where either a spark or a hot surface igniter will actually ignite the gas. As the gas is ignited, the flame sensor produces a current of electricity. The electricity is calculated in micro amps. If the furnace’s control board fails to read the proper level of micro amps, the furnace will quit giving the system fuel to prevent an explosion.
Over time, if the flame sensor is not cleaned properly, oxidation or carbon buildup can impede the flame sensor’s ability to function properly, which can result in a malfunction of the furnace.
The way to determine if a dirty flame sensor is causing a furnace malfunction is to take a micro amp draw reading, which an expert furnace technician can supply you. If a dirty flame sensor is the guilty party, the furnace expert will clean the sensor with steel wool. If dirt was the only factor, we will see a significantly higher amp reading. If the reading doesn’t change, the technician will carry on with the furnace repair diagnostic process.
If you aren’t confident your furnace is going to outlast these last few weeks of winter, give Atmostemp Service Experts a call and we’ll come out and perform a full furnace maintenance or a complimentary in-home estimate on a new HVAC system.