How to Repair a Compressor?
2 Answers
For issues with the compressor motor, problems with the suction and exhaust valves not closing tightly, and faults in the thermal protector, replacement is the recommended solution. For compressor seizure or stuck piston issues, repair can be attempted first using the following methods: 1. Tapping Method: After turning on the compressor, tap the lower half with a wooden hammer to vibrate the stuck internal parts into operation. 2. Capacitor Start Method: Use a capacitor with a higher capacitance than the original to start the circuit. 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.
As someone who frequently works on my own car, I have to say repairing a compressor is no easy task. First, you need to check if there's any refrigerant leakage in the system. If you hear unusual noises or the AC isn't cooling, the compressor might be seized. I've fixed it a few times, and the common tools I use are pressure gauges to measure high and low pressure—the standard is 20-30 psi for low pressure and 200-250 psi for high pressure. If it's low, you can top up with R134a refrigerant, but don't attempt this carelessly, as the refrigerant is toxic—gloves and goggles are a must. If the belt is loose or worn, I can tighten it or replace it myself, but if the internal parts of the compressor are damaged, like the bearings, you'll likely need to replace the whole unit. Remember to turn off the engine before working on it—safety first. Regular maintenance is crucial; checking the AC filter and belt tension every two years can prevent major repairs. In short, for complex issues, it's better to consult a professional technician—it saves a lot of hassle.
