Viessmann D6 Error !!install!!

Have you fixed a D6 error another way? Let us know in the comments below.

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The error code D6 often means the DE1 input at the EA1 extension module is reporting a fault. viessmann d6 error

If the main logic board has a fault (e.g., blown capacitor, damaged processor), it cannot send or receive bus signals. This is a more expensive repair. Have you fixed a D6 error another way

Input DE1 on the EA1 extension module is reporting a fault. viessmann d6 error