Requires removing the front panel (refer to your manual).
Here is the action plan depending on your diagnosis: viessmann d6 error
Some technicians or homeowners keep a spare. Plugging in a known‑good display will instantly confirm if the original display is faulty. Requires removing the front panel (refer to your manual)
Here is the action plan depending on your diagnosis:
Some technicians or homeowners keep a spare. Plugging in a known‑good display will instantly confirm if the original display is faulty.
