I think its ACC unit Econ button. There is some mess up in there behind that button.( Unless someone had opened it in past and wired it wrong) Also check if AC comp is off if you push the Normal button( the one next to economy). Its definitely some mess up in wiring. I am not so sure about the low freon switch. though I would check the condition of connections on it.


Let us know how it goes.

MVK

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1985 300D Turbo 179,000miles