What Causes Frequent Cycling of the Car Air Conditioning Compressor?

[Kristin]

Frequent cycling of the car air conditioning compressor can be attributed to the following reasons: 1. Activation of the car air conditioning's energy-saving mode: Similar to a household refrigerator, the energy-saving mode shuts off the compressor when the self-checked temperature reaches the set target, achieving energy-saving effects. When the temperature rises and deviates from the set temperature, it restarts to bring the temperature back on track. Many Japanese car models feature this energy-saving mode, which is a normal phenomenon and does not indicate a compressor issue. 2. High discharge pressure or low suction pressure: The presence of moisture in the system can lead to pipe blockages, causing icing. This can be repaired by flushing the pipes with high-pressure nitrogen. Blockages inside the expansion valve can also affect suction pressure. Adjusting the suction pressure by increasing the expansion valve opening and increasing cooling water flow can help reduce discharge pressure. 3. Insufficient or excessive refrigerant: The amount of refrigerant determines the system pressure, and abnormal pressure can cause frequent compressor cycling. Therefore, it is important to regularly check the refrigerant level.