What are the reasons for a car air conditioning compressor not working?
4 Answers
The reasons for a car air conditioning compressor not working are as follows: severe internal wear of the compressor, leading to inability to function properly; insufficient refrigerant in the car air conditioning system; circuit system failure, etc. Factors such as insufficient refrigerant in the car air conditioning compressor, relay failure, pressure switch tripping, and others may cause the car air conditioning compressor to fail to engage. Extension: 1. Function of the air conditioning compressor: The car air conditioning compressor is the heart of the car air conditioning refrigeration system, responsible for compressing and transporting refrigerant vapor. Compressors can be divided into fixed displacement and variable displacement types. Based on different working principles, air conditioning compressors can be categorized into fixed displacement compressors and variable displacement compressors. 2. Technical classification: Compressors can generally be divided into reciprocating and rotary types. Common reciprocating compressors include crankshaft connecting rod type and axial piston type, while common rotary compressors include rotary vane type and scroll type.
The compressor not working might be related to an experience I had. One day, while driving a long distance, the air conditioning suddenly stopped cooling, and the compressor showed no response at all. There are several common causes: first, electrical faults, such as a blown fuse or a stuck relay preventing power supply; second, mechanical issues, like a broken or loose drive belt that prevents the compressor from turning; third, system protection, where insufficient refrigerant or pressure that's too low or too high triggers sensors to prevent the compressor from starting; fourth, clutch damage, causing the compressor not to engage; fifth, control module errors, such as false fault signals from the computer. Later, I found out it was due to an aged and faulty relay, and replacing it fixed the issue. I recommend doing a simple test before using the car in summer—turn on the air conditioning and listen for the compressor's sound to prevent sudden failures.
The compressor not working can have multiple causes, including electrical issues such as short circuits or blown fuses, which can be checked in the engine compartment fuse box; mechanical problems like a broken belt or failed tensioner preventing rotation; system-related issues such as refrigerant leaks causing abnormal pressure and triggering protection; clutch wear or jamming preventing engagement; or sensor failures like incorrect temperature readings preventing operation. When I repaired my car, I encountered a situation where the compressor was jammed by debris, and it returned to normal after cleaning. When troubleshooting, start with the basics like checking fuses and belts, use a multimeter to confirm current, and if that doesn’t work, seek professional help for deeper diagnostics to avoid worsening the problem with prolonged use.
The reasons for the compressor not starting are usually electrical faults such as blown fuses or faulty relays causing current interruption; belt issues like breakage or looseness leading to mechanical failure; system protection due to low refrigerant levels or low pressure preventing startup; damaged clutch failing to engage; or control board errors sending incorrect signals. A simple approach is to first check easily repairable parts like fuses and belts, and if that doesn't work, seek professional repair services for quick resolution to ensure safe summer driving.
