The warm air at the bottom of the driver's seat is too small.

A small amount of warm air may be affected by low blower speed or pipe blockage. After this happens, you should check the blower and air duct. If there is something wrong with the blower, it can only be replaced. If the air duct is dirty, it can be cleaned.

The heating principle of automobile air conditioner is very simple. When heating, the high-temperature antifreeze in the engine will flow through the heater box. At this time, the wind from the blower may also pass through the warm air slot, so that the air outlet of the car air conditioner blows warm air.

Warm air tank is a heat exchanger, which is very important for vehicle air conditioning. Without this component, the vehicle air conditioner can't heat.

The refrigeration principle of car air conditioner is also very simple. When cooling, the engine will drive the compressor to run. At this time, the compressor can continuously compress the refrigerant and transport it to the evaporation box, where the refrigerant expands and absorbs heat, so that the refrigerant cools the evaporation box, and the cooled evaporation box can cool the wind blown by the blower, so that the air outlet of the vehicle-mounted air conditioner blows cold air.

The refrigerant used in most vehicle air conditioners is r 134a, which needs to be replaced regularly. If it is not replaced for a long time, it will affect the cooling effect and slow down the cooling speed.