What are the reasons for the compressor not starting?
3 Answers
There are several reasons why a car air conditioning compressor may not start: 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 malfunction, pressure switch tripping, etc., can all cause the car air conditioning compressor to fail to engage. Additional information: 1. 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. Compressors can generally be classified 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.
There are several common reasons why the compressor won't start. From my experience, it's usually either an electrical or mechanical issue. A blown fuse is the most frequent culprit—check the fuse box under the hood for the one labeled AC or compressor, and replace it if melted. Relay failure is another problem; that little box controlling the electrical current can fail and cut off power. On the mechanical side, if the compressor belt is loose or broken, it won't turn—listen for unusual noises when starting the engine. The compressor itself might be seized, which is rare but serious. Low refrigerant levels can also trigger this issue; if system pressure is too low, the protection mechanism prevents the compressor from starting. Additionally, faulty AC switches or sensors are potential factors, as poor wiring connections can interrupt signals. In short, start with the simple checks first to avoid wasting time and ending up too hot while driving.
The compressor won't start, and it needs to be addressed promptly to avoid further trouble. In my opinion, the main reasons include a blown fuse, which can be easily resolved by checking the fuse box; a faulty relay that affects current transmission; belt issues, such as wear or breakage preventing the compressor from turning; refrigerant leakage triggering the pressure switch and preventing startup; and control system failures like switch malfunctions. I remind you not to overlook safety—prolonged lack of cooling can affect visibility and health, especially on hot days. It's advisable to first check the fuse yourself, and if that doesn't work, take it to a repair shop as soon as possible for inspection to prevent minor issues from becoming major ones. Remember to regularly maintain the air conditioning system to prevent these faults.
