What causes the intermittent cooling and heating of the BYD e5 air conditioning?
3 Answers
Here are the reasons for the intermittent cooling and heating of the BYD e5 air conditioning: 1. Loose compressor wiring: When the air conditioning is first turned on, the compressor starts working, compressing the gaseous refrigerant in the system into a high-temperature, high-pressure gas, which is then sent to the condenser for cooling. After cooling, it becomes a high-temperature, high-pressure liquid, passing through the dryer for drying and filtration, then through the expansion valve and evaporator, before returning to the compressor. 2. Poor contact of the pressure switch: When the high-temperature, high-pressure liquid passes through the expansion valve, all the liquid expands and undergoes a drastic change, turning into a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid causes the temperature of the evaporator to drop rapidly, so the air blown by the air conditioning motor becomes cold after passing through the evaporator. 3. Compressor clutch failure: When the temperature gradually rises above 0 degrees, the ice blockage in the pipeline begins to slowly melt, and part of the pipeline resumes refrigerant circulation, restoring the cooling effect. This leads to the next cycle of ice blockage, resulting in the phenomenon where the air conditioning blows cold air when first turned on but soon turns into hot air.
I once encountered an issue with the BYD e5's air conditioning system where it would intermittently blow hot and cold air. This is usually caused by a refrigerant leak. The air conditioning system requires a stable amount of refrigerant; if the level is insufficient or there's a minor leak, the compressor will malfunction, leading to alternating hot and cold air. Another common cause is a clogged cabin air filter, which can obstruct airflow and reduce cooling efficiency. This problem becomes particularly annoying during summer drives and can also increase fuel consumption. I recommend first checking the refrigerant sight glass to see if the level is too low. If the filter is dirty, replacing it yourself isn’t too difficult. Regular maintenance is crucial—I take my car to a professional shop every year for an air conditioning system inspection to ensure there are no leaks or other hidden issues. In short, ignoring this problem could damage the air conditioning system, so addressing it early can save both hassle and money.
In repair experience, intermittent cooling and heating of the BYD e5 air conditioning is commonly caused by compressor clutch failure. If the clutch is worn or stuck, it may engage and disengage erratically, leading to unstable cooling. The temperature control sensor could also be problematic—if it inaccurately detects cabin temperature, it may send incorrect commands to the system. Circuit short circuits should not be overlooked either, as they may damage the control module, causing unstable output. During troubleshooting, it's best to use a diagnostic tool to read fault codes for quick identification of the root cause. Before starting any work, remember to turn off the engine and check if the battery voltage is normal, as unstable voltage can also affect performance. If DIY repair isn't feasible, promptly take the car to a professional shop to avoid compromising driving comfort and safety. Regular maintenance can help minimize such issues.
