What are the reasons for insufficient cooling in car air conditioning?
2 Answers
Insufficient cooling in car air conditioning is caused by insufficient refrigerant. The main reason for low refrigerant levels is minor leaks in the system. When refrigerant is insufficient, the amount sprayed into the evaporator by the expansion valve will inevitably decrease. Consequently, the heat absorbed during refrigerant evaporation in the evaporator will also reduce, leading to decreased cooling capacity. A car air conditioning system generally consists of the compressor, electromagnetic clutch, condenser, evaporator, expansion valve, receiver-drier, pipelines, condenser fan, and control system. The car air conditioning system is divided into high-pressure and low-pressure pipeline systems.
Last time I drove to the seaside, even with the AC turned up to the max, it wasn't cool enough. Here's why: The most common issue is refrigerant leakage. My old buddy's car, after five years of use, had loose pipe connections that slowly leaked all the refrigerant. If the filter is severely clogged, air can't even blow out, naturally reducing cooling efficiency—I replace mine every six months. Then there are problems with the compressor and condenser. A dirty condenser leads to poor heat dissipation and reduced cooling effect, while a broken compressor is even more troublesome, requiring a complete replacement. There's also the issue of the evaporator freezing up and blocking the air ducts, or the fan not working, leading to inadequate heat dissipation. The most reliable way is to get the refrigerant pressure tested at a repair shop. Minor issues can be fixed by just adding refrigerant, while major problems might require dismantling the dashboard to replace parts.
