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Climate Control malfunctioning (1991 C-4 Cab)

Heating and Ventilation

Vehicle Information: Model: 964 C-4 Cab; Year: 1991; Body Type: Convertible; Engine (type, size, modifications): 3.6l; Total Mileage: 39412;

Two years ago, I replaced my malfunctioning climate control module. Yesterday, when driving my car, I noticed that the Climate Control would not work at all. Fan Control, Temperature Control, Slide Vent Controls, Defrost, A/C, Recirc buttons, etc. would not work. Is there any way a fuse blew or a relay failed causing the malfunction? How about a stuck servo?? I'm getting pretty frustrated with this crappy climate control system designed by Porsche. Please help if you can.

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