Dettson User Interface / Keypad Failure

Boiler display is on but unresponsive to buttons or menu navigation

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

Stuck keypad buttons, Moisture ingress into Dettson control panel, Faulty display board, Loose ribbon cable between UI and main board

Safety: Turn off power before removing the front panel or control cover.

Inspect keypad: Check for physical damage or contamination on the buttons. Do not use excessive force.
Dry moisture: If condensation or water is present on the display, dry the area and correct any source of leaks.
Check ribbon cable: Reseat the connector between the user interface board and the main Dettson control board.
Board replacement: If the interface remains unresponsive, the display/keypad board may need replacement by a technician.

Medium 3/5

Dettson user interface board

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