Stiebel Eltron Frozen User Interface

Display is on but unresponsive to button presses or rotary knob adjustments.

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

Software glitch in control electronics, Stuck button or knob, Faulty keypad or encoder, Communication issue between UI and main board

Safety: Turn off power before removing the front panel.

Power reset: Turn off the breaker for 2–3 minutes, then restore power to see if the interface recovers.
Check for stuck controls: Gently press each button and rotate the knob (if present) to ensure they move freely. Clean around them if dirt or scale is present.
Inspect UI cable: Reseat the cable between the user interface and main board.
Module replacement: If the interface remains frozen after reset and cable check, replace the user interface module with the correct OEM part.

Medium 3/5

User Interface / Control Panel

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