1985 Mercedes 300 CD

Not sure if this Post should go here in Diesel, or elsewhere in Tech?

After working well all summer, today my AC began blowing hot air. I checked the fusebox legend and it said the Blower Motor and AC Compressor is No. 8 fuse (By the way, the Blower Motor continues to blow (hot) air just fine)

I checked to find No. 8 fuse (blue, 25 Amp) discolored, so I replaced it with a new fuse. In short order, that fuse blew as well.

I know to check to wires to the clutch on the AC compressor. I guess it could be a faulty, shorting, button in the Climate Control module?

Any other suggestions of places to look would be greatly appreciated