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Faulty air-cond
Question : I OWN a 1995 Mitsubishi Pajero Stationwagon (imported version). The air-conditioner has dual compressors, one blowing from front and the other at the third row seats. More than one year ago, the system started to develop problems. At first the front cooling coil leaked, followed by the rear cooling coil. Both were replaced with new ones. After the change, the refrigerant leaked frequently and has to be topped up once every three months. My air-cond repairer has given up diagnosing the problem. He had checked the piping system and could not find any leak. Now the air-cond system has gone flat again. I have spent a lot of money and time going for repairs. What is actually wrong? My air-cond system is capable of emitting warm air as it is suitable for use in cool climate in Japan. What steps should be taken to rectify the problem? Answer : Firstly, remember that air conditioning systems work at quite high pressures and therefore if there is a leak anywhere in the system, the efficiency will drop very fast. Secondly, your vehicle is running on one compressor and two cooling coils, not two compressors. If you have leaks, you have to track them down with a leak detector and get them rectified. You also have to look at the whole system, particularly the compressor and things like the expansion valves as the vehicle is quite old and such components should already be showing their age and due for replacement. Finally, have you tried going to another air-cond shop?
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