Kospel Display Backlight / LCD Failure

Boiler display is blank or very dim, but the boiler still heats

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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

Failed display backlight, Loose display connector, Aging LCD panel, Low supply voltage to interface

How to Fix / Troubleshooting

Safety first: Turn off power before removing the front panel.

Steps to check:

  • Ambient light: Shine a flashlight at an angle on the display; if you can faintly see information, the backlight has failed.
  • Check connections: Reseat the connector between the display and the main control or interface board.
  • Verify supply: A technician can measure the low-voltage supply to the display to confirm it is within specification.
  • Replace display: If the backlight or LCD is defective, the user interface module will need replacement.

When to call a technician: Display replacement should be done by an authorized Kospel service technician to maintain sealing and safety.

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Repair Difficulty

Medium 3/5

Required Part

Display / User Interface Module
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