Why the warm air is not hot and its solution?

The heater is not hot because the heater water tank is blocked, the cooling system is short of coolant, and the thermostat is faulty.

We can mainly check whether the air conditioning filter element and water temperature are normal, and then see whether the fan of the water pump works normally. If there are no problems with these items, it is recommended to drive the car to a 4S shop or a repair shop for professional maintenance. The heating system of a car is different from that of a household air conditioner. Its principle is that the engine will emit a lot of heat when the car is in use, and when the heat is blown into the car through the warm air duct, it will feel warm air.