I have this issue for 5 years. HondaCivic 93 144k. The AC is cold when weather is cool, but blows hot air when weather is hot. Recently I brought it to a mechanic. After inspection, he said there was no leakage, the compressor works fine. He replaced the expansion valve for $250 and refilled the freon. He used a temperature measure device to show me that the air blowing out of the expansion is 33Fdegree. So I thought he fixed the problem. It's been 3 weeks; I still experience a similar issue. When I use my car around 10am to go to work, the AC is freezing cold. The AC would continue to be cold forever if I don't turn it off. When I go uphill, the AC stops blowing cold air until I get over the hill. My job is in a hot valley, the car parked outside, air in the car get up to 200F. At lunch (2 hours later), the AC can still get cold. When I drive home at 6pm, the AC blows extremely hot air. The trip takes 30'; the AC seems to never stop blowing hot air. At 8pm, it can get cold again
2007-08-15
11:29:48
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