What are the reasons for the air conditioning in new energy vehicles not cooling?
4 Answers
The reasons for the air conditioning in new energy vehicles not cooling are as follows: 1. Insufficient or too little refrigerant. 2. Caused by minor refrigerant leakage. 3. Too much refrigerant can also cause the air conditioning not to cool. 4. The condenser is too dirty. 5. Damage to the air conditioning flap. 6. Abnormal pressure in the air conditioning system. 7. The compressor drive belt is too loose. 8. Excessive impurities in the refrigerant and refrigeration oil. Additional information: 1. Introduction to new energy vehicles: New energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources (or use conventional vehicle fuels with new types of on-board power devices), integrating advanced technologies in vehicle power control and driving, forming vehicles with advanced technical principles, new technologies, and new structures. 2. New energy vehicles include four major types: hybrid electric vehicles (HEV), battery electric vehicles (BEV, including solar-powered vehicles), fuel cell electric vehicles (FCEV), and other new energy (such as supercapacitors, flywheels, and other high-efficiency energy storage devices) vehicles.
Yesterday, my neighbor's newly purchased new energy vehicle had its air conditioning fail. After taking a look, I found several possible causes: the most common is refrigerant leakage, which can occur due to loose pipe connections or a condenser damaged by stones; next is an electronic compressor failure—new energy vehicles use electric-driven compressors, and a malfunctioning control module or worn motor brushes can lead to cooling failure; it could also be a high-voltage electrical system issue, such as a faulty DC-DC converter that powers the air conditioning, or the small battery voltage being too low to drive the compressor. If the cooling effect drops by 30% after summer sun exposure, it might be due to a stuck cooling fan or a condenser clogged with willow catkins—remember to clean the radiator first. If there's a hissing sound when the compressor starts, it's likely that the refrigerant is low and needs a refill.
In my research on the three-electric systems of new energy vehicles, I found that air conditioning failures often involve these pitfalls: abnormal operation of the PTC heater in the heat pump air conditioner can cause reverse heating; the battery thermal management system competing for resources may lead to limited air conditioning power; excessive system voltage fluctuations can automatically cut off the compressor protection circuit. The recent Tesla recall was caused by a defect in the refrigerant pressure sensor. It is recommended to first check the 15A air conditioning fuse in the fuse box, and then check if there are any pop-up error messages on the central control screen. Some car manufacturers optimize air conditioning logic after OTA updates, so remember to keep the vehicle's system up to date. In daily use, avoid parking for long periods with low battery to prevent chain failures caused by the small battery running out of power.
Personal experience last week! Went on a road trip and found the AC blowing hot air, the repair bill almost made me faint. The mechanic said these are common issues with new energy vehicles: a stuck electronic expansion valve can prevent refrigerant circulation; temperature sensors exposed to direct sunlight may falsely report high temperatures; and passengers kicking the footwell vents can damage the flap motor gears. The worst part is some hybrid models limit AC power when the engine isn't running. If you hear rattling noises from the dashboard, it's likely the AC damper motor is broken. Now I've learned: clean the filter monthly, don't block the air intake with clutter on the windshield, and using remote start to pre-cool can reduce sudden compressor failures.
