What Causes High Low Pressure and Low High Pressure in Car AC Without Cooling?

[MacGemma]

Low pressure being high and high pressure being low is caused by: the compressor's displacement output failing to meet requirements, leading to expansion valve malfunction; the lack of cooling is due to insufficient refrigerant in the compressor. Details are as follows: Compressor displacement output failing to meet requirements: When encountering high low pressure and low high pressure conditions, repairs are necessary to have professionals identify all faults. If the compressor's high-pressure pipe shows signs of blackening, replacement is required until the AC operates at normal pressure. Insufficient refrigerant: Low refrigerant levels can be addressed by adding more refrigerant. Compressor faults require checking for blockages or leaks. Blockages, caused by excessive dirt, necessitate cleaning, while leaks require repairing the leakage points.