Onan Display / HMI Failure

Control panel display is dim, unreadable, or segments missing

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/LED display module, Loose ribbon cable or connector, Moisture ingress into control panel, Faulty controller HMI driver

Safety first: Disable auto-start and disconnect battery negative before opening the control panel.

Inspect panel for moisture: Look for condensation or water damage. Dry the area and correct any enclosure sealing issues.
Check connectors: Reseat the ribbon cable or plug between the display and main controller. Inspect for bent pins.
Display replacement: If the display remains dim or missing segments, replace the display module or entire controller panel as specified by Onan.

Medium 3/5

Control Panel Display Module

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