What are the reasons for the car compressor working normally but not cooling?
3 Answers
Car air conditioning compressor is working normally but not cooling, the specific reasons are as follows: 1. Refrigerant issue: The reason why the car air conditioning is not cooling may be due to a problem with the refrigerant in the car air conditioning system. 2. Filter blockage: The filter screen is blocked, increasing the resistance to cooling, resulting in the car air conditioning not cooling. 3. Dryer saturation: There is a dryer in the car air conditioning refrigeration system, whose main task is to absorb moisture in the refrigerant and prevent excessive moisture in the refrigerant from reducing the cooling capacity. When the desiccant in the dryer is saturated, moisture cannot be filtered out in time, resulting in the inability to cool.
Having run an auto repair shop for decades, I've seen countless cases where the compressor works but there's no cooling. The most common culprits are refrigerant leaks or insufficient charge – any system leak will cause coolant loss. The expansion valve might be stuck, unable to regulate refrigerant flow. Fan failures lead to poor heat dissipation, while clogged condensers reduce efficiency. My advice: start with simple DIY checks – listen for fan operation and inspect pipes for oil stains (a telltale leak sign). Never randomly top up refrigerant; professional leak detection is mandatory to prevent recurring issues. Regular AC system maintenance prevents these headaches – especially getting a comprehensive check before summer heat waves ensures both safety and peace of mind.
Last time my car's A/C had a similar issue—the compressor was working fine, but the vents weren't blowing cold air. After inspection, it turned out the expansion valve had failed, preventing the refrigerant from properly expanding to cool. Other possibilities include insufficient refrigerant or a leak, clogged filters blocking airflow, a faulty cooling fan affecting condensation, or even sensor errors. I drove to the repair shop, where the mechanic quickly located and fixed the leak using diagnostic tools. If you notice your A/C isn’t cooling while driving, don’t ignore it—summer heat poses serious risks. Prompt repairs ensure safety and comfort. Remember to clean the A/C filter regularly to extend the system’s lifespan.
