How to Solve Compressor Thermal Protection?
2 Answers
Solutions for compressor overheating protection: 1. The outdoor unit's heat sink is too dirty—clean the heat sink. 2. The fan speed decreases—rinse the outdoor unit's heat sink with tap water. 3. The indoor unit's filter is too dirty—clean it promptly. 4. Too much Freon—contact a professional technician to check the pressure, evacuate the system, recover the Freon, and then recharge it. 5. Incomplete vacuuming of the refrigeration system—replace the refrigerant. Below are the functions of an air conditioning compressor: 1. The air conditioning compressor compresses and drives the refrigerant in the refrigeration circuit, regulating the temperature. 2. The refrigerant flows from the high-pressure zone to the low-pressure zone, is sprayed into the evaporator through the capillary tube, compressed, and then sent to the high-pressure zone for cooling and condensation, absorbing a large amount of heat from the air. The heat from the low-pressure zone is absorbed into the refrigerant through the heat sink and then released into the air in the high-pressure zone. The refrigerant changes from a gaseous to a liquid state, increasing pressure, thereby enabling the air conditioning compressor to function.
When the compressor thermal protection is triggered, the system will stop working to prevent damage. Common causes include insufficient refrigerant, a blocked cooling system, or fan malfunction. For troubleshooting, I recommend parking the car and letting the engine cool down for about 10-15 minutes before restarting the air conditioning. If the issue persists, check if the refrigerant level is low—top it up if necessary. Also, clean dust from the condenser surface to ensure proper airflow. Insufficient cooling may also result from abnormal fan operation; you can manually check if the wind speed is strong enough. Regular maintenance of the air conditioning system, with at least an annual check before summer, can effectively prevent such issues. Compressor overheating not only reduces cooling efficiency but also increases repair costs, so early intervention is crucial.