I bought this car about 5 months ago, with 37,000 miles on it. Now that it has gotten warm, I'm noticing an intermittent problem. The AC will work fine for a while, then stop working. My mechanic found that the low side pressure stays fairly constant, while the high side pressure will bounce around considerably and get very high (up to 500 psi). They flushed the system and the problem got worse. The AC will work on part of a short trip, then stop. On the return trip, it may or may not work at all. My mechanics are stumped. They think it may be a switch, but they're hesitant to put one in, have me drop $150, and then have it not solve the issue.
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