Oster Keypad ghosting / control panel contamination

Microwave keypad beeps but settings change by themselves or random numbers appear.

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

Moisture inside keypad, Conductive residue on touch panel, Failing keypad matrix, Faulty control board key-scan circuit

Safety first: Unplug the microwave before working on the control panel.

Dry thoroughly: If the panel has been exposed to steam or cleaning sprays, leave the unit unplugged for 12–24 hours to dry.
Clean surface: Wipe the keypad with a slightly damp cloth and then dry. Do not spray cleaner directly onto the panel.
If ghosting continues: Replace the membrane keypad or entire control panel assembly. If a new keypad does not fix it, the control board may also need replacement.

Medium 3/5

Membrane Keypad

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