Weishaupt Display Backlight / LCD Fault

Water heater’s display is dim, flickering, or unreadable, but the unit still heats water.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Aging LCD display, Loose display connector, Low internal supply voltage, Faulty display module

How to Fix / Troubleshooting

Safety: Turn off power before accessing the display module.

  • Check supply voltage: Ensure the mains supply is stable and within specification.
  • Inspect connectors: Remove the front cover and reseat the display connector on both the display and main board.
  • Replace display: If the heater operates normally but the display remains unreadable, replace the Weishaupt display module.
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Repair Difficulty

Medium 3/5

Required Part

Display Module
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