Why is the car air conditioner not cooling but blowing hot air?

[AshlynDella]

Here are the reasons why the car air conditioner is not cooling but blowing hot air: 1. Reason one: The vehicle's air conditioning system lacks refrigerant. In this case, you need to go to a repair shop to check the system pressure with a pressure gauge. If there is a lack of refrigerant, it needs to be replenished immediately. 2. Reason two: The surfaces of the vehicle's condenser and radiator are too dirty, leading to poor heat dissipation. In this case, you need to go to a repair shop to flush the surfaces of the condenser and radiator. 3. Reason three: The vehicle's air filter is too dirty, causing low air velocity. In this case, you need to replace the air filter with a new one. 4. Reason four: The quality of the refrigeration oil in the compressor of the refrigeration system has deteriorated, leading to reduced lubrication efficiency, which causes damage to the air conditioning compressor. This directly affects the expansion valve and throttle valve, resulting in faults that cause the car air conditioner to not cool.