What Causes Frequent Cycling of Car Air Conditioning Compressor?

[AlanaMarie]

There are several reasons for frequent cycling of a car air conditioning compressor: 1. Activation of the car air conditioning's energy-saving mode. When the temperature rises significantly above the set temperature, the system restarts to bring it back on track. Many Japanese car models have this energy-saving mode, which is normal operation and doesn't indicate compressor issues. 2. High discharge pressure or low suction pressure. Moisture in the system can cause pipe blockages leading to icing. 3. Insufficient or excessive refrigerant. The amount of refrigerant determines system pressure, and abnormal pressure can cause frequent compressor cycling. 4. Relay setting limits are too high. If the high/low pressure limit values are set too high, the relay will automatically cut off when voltage slightly exceeds the threshold. Adjust by slightly increasing the high-pressure relay limit and decreasing the low-pressure relay limit.