Sharp Keypad / Touch Panel Failure

Humidifier or dehumidifier buttons do not respond or respond intermittently.

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

Worn membrane switches, moisture ingress into control panel, loose ribbon cable between panel and PCB, failed touch controller IC

Safety: Unplug the unit before opening the control panel.

Steps:

Drying: If the panel was exposed to water, allow it to dry completely for 24 hours.
Inspect ribbon cable: Remove the control panel cover and reseat the ribbon cable between the keypad and display PCB.
Clean contacts: If accessible, gently clean connector contacts with isopropyl alcohol.
Replace panel: If specific buttons never work or require excessive pressure, replace the keypad membrane or entire control panel assembly as supplied by Sharp.

Medium 3/5

Control Panel / Keypad Assembly

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