What is the reason why the van warm air is not hot?

The reason why the heater of the van is not hot is that the hot water does not reach the heater water tank. These include the blockage of heating pipes and the failure of warm water valves. This kind of fault only needs to touch two warm water pipes entering the cab before the warm water valve in the engine compartment. If one is hot and the other is cold, there is something wrong with the warm water or the warm water piping system.

principle of operation

Warm air comes from the heat generated when the engine is working: when the cooling system of the engine radiates heat to the engine, the radiated heat is sent into the car through the fan to form warm air. When the warm air is not used, the fan stops running, the hot air port is closed, and the heat emitted will be completely dissipated into the atmosphere. Therefore, the car heater belongs to waste recycling and will not consume oil. When the car starts, the engine starts to warm up, and then the heating air conditioner is turned on after the engine temperature pointer points to the middle position.