Setting up your routine furnace maintenance helps keep your heating equipment working up to 30% more efficient and helps extend the life of your system. But things may still malfunction, and when they do, you could 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 feature on your gas furnace. During the ignition pattern, your gas furnace enters a process where a spark or a hot surface ignitor actually ignites the gas. When 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 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 properly, oxidation or carbon buildup can impede the flame sensor’s ability to function properly, which can cause the furnace to malfunction.
The way to diagnose if an unclean flame sensor is to blame for a furnace malfunction is to take a micro amp draw reading, which a professional furnace technician can supply you. If a dirty flame sensor is the reason, the heating expert will clean the sensor with steel wool. If dirt was the only factor, we will see a notably higher amp reading. If the reading doesn’t change, the technician will proceed with the furnace repair diagnostic process.
If you aren’t certain your heating equipment is going to outlast these last few weeks of winter, give D.A. Bennett Service Experts a call and we’ll come out and perform a full furnace maintenance or a no-charge in-home estimate on a new HVAC system.