What is the reason for the squeaking sound from the car air conditioning compressor?

[Reyes]

If the car air conditioning compressor makes a squeaking sound, it may be due to noise from the compressor belt or the tensioner pulley of the compressor belt. The compressor is a crucial component in the air conditioning system. Without the compressor, the air conditioning cannot provide cooling. The car air conditioning is an important comfort feature in a vehicle. The cooling principle of the air conditioning is quite simple: when the AC button is pressed, the compressor clutch engages, and the engine drives the compressor to rotate. This allows the compressor to continuously compress the refrigerant and deliver it to the evaporator. Inside the evaporator, the refrigerant expands and absorbs heat, thereby cooling the evaporator. The cooled evaporator then cools the air blown by the blower, resulting in cold air being emitted from the air conditioning vents.