What are the reasons for the air conditioning not cooling after vehicle inspection?
2 Answers
The reasons for the air conditioning not cooling after vehicle inspection are insufficient refrigerant in the car's air conditioning system, dirty condenser, and aging or loose compressor drive belt. Reasons for insufficient refrigerant: After prolonged use of the car's air conditioning, the refrigerant may be depleted, leading to insufficient cooling and affecting the air conditioning's performance. Leakage of refrigerant in the car's air conditioning system is another cause. Once the refrigerant leaks and is gone, both the internal and external units of the car's air conditioning will operate normally, but there will be no cooling effect, resulting in the air conditioning not cooling. Solutions for insufficient refrigerant: Inspect the pipelines, air conditioning pump, condenser, evaporator, and other components in the car's air conditioning system for any damage that may cause refrigerant leakage, then replace the faulty parts. While adding refrigerant, also add fluorescent dye. After using the vehicle for a week, check the air conditioning system with a dedicated UV lamp. If any leakage points glow, it indicates that the component is damaged and needs to be replaced. Introduction to refrigerant: Refrigerant, also known as coolant or refrigerant, is the medium substance used in various heat engines to complete energy conversion. These substances typically use reversible phase changes (such as gas-liquid phase changes) to increase power. Examples include steam in steam engines and refrigerant in refrigeration systems. Generally, a steam engine releases the thermal energy of steam during operation, converting it into mechanical energy to generate motive power.
After the vehicle inspection, the AC suddenly stopped cooling. I've been driving for years and seen this happen a lot. It's probably caused by the inspection process—they might have accidentally pulled a fuse or loosened an AC wire while checking the engine or electrical system. Blown fuses are most common; they melt when the current is too high. Sometimes the buttons get turned off by mistake, like switching to the wrong mode. Last time after an inspection, I popped the hood and checked the fuse box—found a small blackened fuse, replaced it, and problem solved. Or maybe the refrigerant line got bumped and leaked. You should check this immediately; don't delay driving in hot weather without AC—it slows you down and increases risks.
