Bosch Display / User Interface Fault

Boiler display is blank or unreadable, but the boiler may still operate partially.

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.

Possible Causes

Faulty display PCB, Loose ribbon cable between display and main PCB, Moisture ingress into control panel, Main PCB low‑voltage fault

Safety: Isolate power before removing the front panel or control fascia.

Steps:

Check for signs of moisture or condensation around the display; address any leaks above the boiler.
Reseat the ribbon cable or plug between the display module and main PCB if accessible.
If the display remains blank, the display module or main PCB may need replacement.

Control panel and PCB replacement should be carried out by a Bosch‑trained engineer.

Hard 4/5

Display / User Interface PCB

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