Heater Assay is a small product that allows for the heating system of vehicles to function properly. In a vehicle is designed to keep the driver and the passengers warm during the winters. The cooling system of the vehicle is also connected to the heating system, and with a turn of the dial, the driver can easily switch from cool air to hot air. The heating system of the vehicle consists of a core heater blower fan/ motor, heater hose, and controls. The working of the heater has nothing to do with the heat that the engine is generating, as that heat will be cooled using coolants, and this heat will be created using the heating system in the vehicle. The heating system in the vehicle is essential, as it will be the only thing keeping the passengers and the driver warm in cold weather; by producing and spreading hot air inside the vehicle.