I'd love to pull the cursed Klima in my 85 and replace it with manual controls for fan, heat and distribution. Is it possible to retrofit non-automatic controls from an earlier or lesser model like a 240?
Just in case it's an easy fix, here's the problem: My Klima will come on quick, roast you for ten minutes and then the heat quits. I just touched up a bunch of solder joints to fix a non-functioning fan. Did I not go far enough?

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1978 Ford F-150 351M
2002 Kia Spectra 1.8l 5-sp
1985 Volkswagen Scirocco 8V 1.8l 5sp
1985 MB 300D Turbo California

"Die Natur verabscheut Vakuum"