What are the reasons for the BYD S6 air conditioner not cooling?

[PeterDella]

The reasons for the BYD S6 air conditioner not cooling include excessive refrigerant, insufficient refrigerant, excessive impurities in the refrigerant and frozen engine oil, and minor blockages. Excessive refrigerant: If the refrigerant in the air conditioning pipeline exceeds the standard, the system pipeline pressure will rise accordingly, which in turn will cause poor heat dissipation in the system, making the air conditioning not cooling phenomenon more severe. In this case, the excess refrigerant must be removed. Insufficient refrigerant: A slight leakage of refrigerant in the system leads to insufficient refrigerant, which will inevitably reduce the amount of refrigerant sprayed into the evaporator from the expansion valve. When the refrigerant evaporates during the evaporation period, the absorbed heat will also decrease accordingly, leading to a reduction in cooling capacity. In this case, refrigerant needs to be added. Excessive impurities in the refrigerant and frozen engine oil, and minor blockages: In the entire air conditioning system, if there are too many impurities in the refrigerant and frozen engine oil, the filter screen of the filter will inevitably become clogged, affecting the cooling passage capacity, increasing resistance, and possibly reducing the refrigerant in the expansion valve proportionally, thus affecting the insufficient cooling capacity. In this case, it is necessary to go to a repair shop to find a professional to clean the blockages.

[LeSienna]

A few days ago, the air conditioning in my BYD S6 wasn't cooling properly. As an experienced driver with over a decade behind the wheel, I figured there could be a few common reasons. First, refrigerant leakage or insufficient levels—after several years of use, the pipes can age and start leaking Freon. Second, compressor failure—if you don't hear the usual humming noise, it's likely broken. Another possibility is clogging in the condenser or evaporator, where accumulated dust affects heat dissipation. Lastly, electrical component issues like blown fuses or short-circuited relays could be the culprit. For troubleshooting, start with the easiest steps: pop the hood to check if the compressor is running, and feel the temperature difference between the high and low-pressure pipes. If the air filter is dirty, replacing it is a quick fix. If DIY efforts don’t resolve it, head to the 4S shop promptly—prolonged AC issues can affect other electrical circuits, and road safety comes first. Regular system cleaning during maintenance can help prevent such problems.

[VanHeidi]

I've been using my BYD S6 for several years, and recently the AC suddenly started blowing hot air instead of cooling, which is really frustrating. Upon inspection, I found a blown fuse, but replacing it didn't fix the issue. Later, I suspected low refrigerant levels, so I bought some tools and topped it up, which helped a bit but didn't last long. Online research suggests it could be a loose compressor belt or a faulty clutch; others say there might be a refrigerant leak in the AC system due to cracks in the pipes. I tried rinsing the condenser with water myself, but professionals advise against tampering to avoid making it worse. This kind of problem requires step-by-step troubleshooting—start with simple checks like seeing if the filter is clogged and affecting airflow. If all else fails, take it to a repair shop; they have pressure gauges to diagnose accurately. Regular ventilation while driving and periodic AC maintenance can help reduce such issues.

[HoldenMarie]

When the BYD S6's air conditioning isn't cooling, I believe the compressor is the key issue. If it's not running, the problem might be in the electrical components, such as a blown fuse, damaged relay, or aging wiring. If the compressor is running but not cooling, it could be due to refrigerant leakage, insufficient pressure, or even a dirty condenser affecting heat dissipation, or a frozen evaporator blocking the cold air. A simple test: start the car and turn on the AC to listen for the compressor sound—no sound means checking the fuse box; sound but no cold air might indicate a refrigerant leak. Regular cleaning of filters and system components can prevent these issues—don’t wait until summer to address them.