Pennco Display / User Interface Failure

Boiler display is blank or unreadable but unit still runs

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 LCD or LED display, Loose ribbon cable, Low-voltage power supply issue, Moisture damage to display board

Safety first: Turn off power before opening control panel.

Inspect connections: Open the control panel and check the ribbon cable or connector between the display and main control board.
Look for moisture: Dry any condensation or leaks and correct the source.
Power supply: Verify low-voltage output from the control board to the display (technician task).
Replace display: If wiring and power are good, the display module may need replacement.

Medium 3/5

User Interface / Display Module

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