Ruud Display / User Interface Failure

Boiler display is blank or unreadable, but unit may still operate

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

Failed display board, loose ribbon cable, low control voltage, moisture damage to interface

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

Inspect connections: Remove the front cover and check the ribbon cable or harness between the display and main control. Reseat firmly.
Check for moisture: Look for condensation or water damage around the display. Address any leaks before replacing parts.
Power cycle: Restore power and see if the display recovers.
Replace display board: If still blank, the display module may need replacement with a Ruud‑approved part.

Medium 3/5

User Interface / Display Board

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