What are the causes and solutions for icing in car air conditioning evaporators?
1 Answers
Car air conditioning evaporator icing causes and solutions are as follows: Compressor failure due to prolonged use: Reduced compression efficiency or damage to the compressor's gas distribution system can lead to excessively low pressure, causing icing. The icing typically occurs in the front part of the evaporator. Adding some refrigerant can resolve the issue. If the problem persists, the compressor must be replaced. Excessive refrigerant: Some air conditioners are refilled with refrigerant due to relocation or leaks. Improper handling by maintenance personnel may result in overfilling, causing excess refrigerant to flow to the rear part of the evaporator, where it evaporates and causes icing. This type of icing usually occurs in the rear part of the evaporator and around the compressor's return pipe. Releasing the excess refrigerant will resolve the issue. Dirty evaporator: After prolonged use, dust from the air or microorganisms generated by the evaporator can accumulate on the evaporator, obstructing airflow and reducing heat exchange. This leads to excessively low evaporator temperatures and icing. The icing typically occurs in the rear part of the evaporator. After the ice melts, rinse the evaporator with water and gently brush along the fins with a soft brush, being careful not to wet the electrical components. Cleaning thoroughly will resolve the issue.
