jcyuhn,

You may have just helped solve my problem too. My compressor seems to be on all the time, even when the Econ. buttom is pressed on the ACC. Everything else works fine, heat and cool, just as they should. It's just that the compressor seems to be running too much. I'm wondering if the relay may be stuck. Does this seem plausable? Thanks.

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LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold