Setting up your seasonal 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 might feel like there is always something else.
This time it’s your heat exchanger, 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 feature on your gas furnace. During the ignition sequence, your gas furnace enters a process where either a spark or a hot surface igniter will ignite the gas. Once the gas is ignited, the flame sensor generates a current of electricity. The current is quantified in micro amps. If the furnace’s control board doesn’t read the correct level of micro amps, the furnace will quit giving the system fuel to avoid an explosion.
Over time, if the flame sensor is not adequately cleaned, oxidation or carbon buildup can hinder the flame sensor’s ability to operate properly, which can cause the furnace to malfunction.
The way to establish if a soiled flame sensor is causing 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 guilty party, the technician will clean the sensor with steel wool. If dirt was the sole factor, we will see a notably higher amp reading. If the reading doesn’t change, the technician will carry on 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 R & M Climate Control Service Experts a call and we’ll come out and give you a full furnace maintenance or a no-charge in-home estimate on a new heating system.