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Heating and Ventilation

Vehicle Information: Year: 1997; Engine (type, size, modifications): Stock; Total Mileage: 59,900;

I recently purchased my Boxster with the AC not working. I took my Porsche to a local mechanic who has little experience with Porsche's but quite a bit with air conditioning systems. He checked connections, replaced the refrigerant with the proper amount and replaced the A/C pressure switch. He really thought that the pressure switch would do the trick. It did not. During the check of various connections, he was looking at the relays in the rear trunk on the left side. For some reason, the compressor kicked in and worked all of the time whether the switches were on or off. At this point, the AC compressor was always on no matter what. This had been for a week or so. As of a day or so ago, the compressor is off no matter what. I checked the relays in the rear trunk by pressing them to make sure the connections were good. this was to no avail. My question to you is whether you know of a simple solution before I take it to the local dealer which will cost a diagnostic fee of $130 to begin with. I would like to fix this myself if possible. If you require further information, please let me know. Thanks for your time and expertise.Mike Stewart

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