The heater matrix is a component within the heater unit and a smaller version of your car’s radiator, which has the engine’s coolant running through it. It uses the coolant to transfer heat into air, blown through it from the heater motor, which then comes out of the vents in the car.
Fluctuations in the temperature in your car is often one of the first signs your heater matrix may be experiencing problems. This could be coupled with another indicator of trouble such as your car fogging up suddenly for no reason. Continue reading