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1999 996 Control Panel HVAC

Heating and Ventilation

Vehicle Information: Model: 996; Year: 1999; Body Type: Cabriolet; Total Mileage: 32K;

On the left side of the lcd HVAC control panel display a black half moon shape is slowly expanding itself to the right and will soon obscure the snowflake icon and the temp. numbers for the air conditioning, fan, etc. Is there any way to fix this short of buying a new control panel- perhaps by resetting it with an electric current? The HVAC system works fine and I just eventually won't be able to see its settings! The same thing happened on my SC400 a few years back but I sold the car while it still had the problem. Would that Porsche would stick with easy to fix mechanical switches! Thanks in advance for your advice . . .

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