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"I could be wrong" but I don't think there is an evap temp sensor, I think this older car has a capillary tube that runs from the evap to the expansion valve and that sort of runs the whole show.
What I would tend to lean towards is the "Klima" relay being bad. This is next to the fuel pump relay and looks just about like it, but has the word "Klima" (German for "climate" I guess) on top. Just for trivia's sake, the fuel pump relay lists the cut-out rpm and the number of cylinders (abbreviated as "zyl") on it.
Anywhoo, the klima relays main job to to make the ac clutch to engage. It takes in a few different bits of information and tells the ac clutch to engage or disengage. If the system is working normally, it might be the relay itself, or a popular failure would invlolve the engine rpm info or ac compressor speed sensor being bad, as the relay looks at engine rpm vs compressor rpm info and uses this info to detect a slipping ac belt. BTW make sure the belt isn't slipping! Or the AC will cut out, heh heh.
Gilly
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