What Causes the Air Conditioning to Not Cool After Long-Term Inactivity?

[MacBrady]

Reasons why the air conditioning does not cool after long-term inactivity: 1. Dirty radiator causing poor heat dissipation; 2. Compressor damage; 3. Lack of refrigerant in the air conditioning system; 4. Broken belt causing the compressor not to rotate. Precautions for using car air conditioning: 1. Correct direction of air conditioning vents; 2. Do not keep the air conditioning in internal circulation for too long; 3. Avoid using the air conditioning for extended periods each time. The car air conditioning system is a device that cools, heats, ventilates, and purifies the air inside the vehicle, providing a comfortable environment for passengers, reducing driver fatigue, and playing a crucial role in ensuring safe driving.

[Lilian]

Long-term unused car AC not cooling, the core issue lies in the key components of the AC system. When a car is parked for extended periods, refrigerant can quietly leak out, often due to aging and shrinking pipe sealing rings. The compressor suffers most from disuse - when lubricant settles, bearings may seize, causing dry friction and failure to start upon activation. The condenser also struggles, as insect debris and leaves clog the cooling fins, trapping heat and reducing cooling efficiency. If the electronic control module loses power for too long, its programming may malfunction and fail to issue startup commands. Having repaired many such vehicles, I first diagnose by testing system pressure; seized compressors require replacement parts costing at least a few hundred dollars. For routine maintenance, running the engine with AC on for ten minutes monthly keeps lubricant circulating, saving both money and hassle.