What Causes a Car's Air Conditioning to Not Cool When Idling?
2 Answers
When the engine is idling, the compressor operates at a slower speed, resulting in poorer cooling performance. Here are the relevant details: 1. Car Air Conditioning: The car air conditioning system (air-conditioning-device), commonly referred to as car AC, typically includes a refrigeration unit, heating unit, and ventilation system. This integrated setup efficiently utilizes the limited space inside the vehicle, featuring a simple structure and ease of operation, making it a popular modern car air conditioning system internationally. 2. Compressor: The compressor (compressor) is a driven fluid machine that converts low-pressure gas into high-pressure gas, serving as the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it via piston movement driven by an electric motor, and then discharges high-temperature, high-pressure refrigerant gas through the discharge pipe, providing the necessary power for the refrigeration cycle.
Over my years of driving, I've encountered many cases where the AC stops cooling when parked. The most common issues are with the compressor or fan. When the car is stationary, the condenser can't dissipate heat effectively, and if the fan isn't running, the heat can't escape, causing the compressor pressure to rise and stop cooling. Last time this happened to me, I checked if the fan motor was stuck, and sure enough, it had aged and failed. Another possibility is refrigerant leakage or insufficient levels, which can cause system pressure imbalance. Remember to clean the dust in the engine compartment, as it can clog the radiator fins and easily trigger this issue. Only after driving for a long time do you realize how crucial AC maintenance is. The refrigerant level should be checked annually, and don't wait until summer to fix it. Otherwise, you'll suffer in the heat and might even break down on the road, increasing driving risks.
