How to Repair Compressor Failure?
3 Answers
For issues with the compressor motor part, poor sealing of the compressor suction and discharge valves, and thermal protector failure, replacement is the recommended solution. For compressor shaft seizure or cylinder jamming, repair can be attempted first. Specific methods include: the tapping method, capacitor start method, high-voltage start method, and pressure relief method. Detailed descriptions are as follows: 1. Tapping Method: After turning on the compressor, tap the lower half of the compressor with a wooden hammer to vibrate the stuck internal components and get them moving. 2. Capacitor Start Method: Connect a capacitor with a larger capacitance than the original one into the circuit to start the compressor. 3. High-Voltage Start Method: Use a voltage regulator to increase the power supply voltage before starting. 4. Pressure Relief Method: Release all the refrigerant from the system before starting.
I've had personal experience with compressor failure repairs. Last summer while driving, the AC suddenly started blowing hot air, and upon inspection, I noticed abnormal noises from the compressor. During repairs, the first step is diagnosing the fault point—like checking if the refrigerant pressure is normal or listening for any stuttering in operation. If it's just a slipping clutch, maybe only the coil needs replacement. But if there's severe internal wear, you'll likely need a whole unit replacement. I once tried adding refrigerant oil myself, but it didn't help much; eventually, I had to visit a repair shop for a complete replacement. The whole process was time-consuming and costly—I'd advise not delaying too long since driving in hot weather without AC can be exhausting. By the way, regular maintenance can prevent such issues, like checking the AC system every 2-3 years.
When the compressor fails, it's essential to address the issue step by step. I prefer starting with the simplest checks first. Begin by inspecting the electrical circuit, such as checking if the fuses are blown or if the wire connections are loose. If everything seems fine, proceed to measure the refrigerant pressure. Low pressure might indicate a refrigerant leak, requiring a recharge, while high pressure could suggest a blockage in the pipeline. Listen for unusual noises during operation—a hissing sound often points to a clutch issue, whereas a knocking noise might indicate internal damage, necessitating part replacement. After repairs, always test-drive the vehicle to confirm the cooling system is functioning properly. This repair involves professional tools like pressure gauges, making DIY attempts risky. Remember to work in a clean environment to prevent dust from entering the system. Although the inspection process can be tedious, timely repairs can significantly extend the system's lifespan.
