Symptoms
- Pressing one number results in a different number appearing
- A single press registers as multiple presses
- Problem is consistent and tied to specific buttons
- Other buttons work correctly
Likely causes
- CommonGrease or residue affecting specific button contactsA film over one area of the touchpad can cause a specific button to misbehave while others work fine.
- CommonWorn conductive contact on a specific buttonFrequently used buttons can wear down their internal contact point faster than others, causing double-registration or crosstalk with a neighboring button.
- Less commonControl board misreading input from an otherwise fine touchpadLess common, but possible if cleaning doesn't help.
What to do
- Clean the entire touchpad thoroughly with a slightly damp, then dry, soft cloth, paying extra attention to the problem button and its neighbors.
- Let it dry completely before testing again.
- Press the problem button firmly and squarely in its center a few times to test whether cleaning resolved it.
- Note exactly which button misbehaves and what it registers as instead, which helps pinpoint whether it's a specific worn contact.
- Try entering the same sequence a few different times to see if the error is consistent or intermittent.
- If cleaning doesn't help and the error is consistent on the same button, the touchpad membrane likely needs replacement.
Tools and parts
- Soft cloth
Microwave touchpad membraneSearch: “microwave touchpad membrane replacement”
When to call a pro
If cleaning doesn't resolve a consistent, specific button misregistration, an appliance technician can replace the touchpad membrane.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.