Microwave display shows E6 and keypad does not respond or responds erratically.

Safety Warning: Unplug the microwave before removing the control panel. Do not touch high-voltage components.

Initial checks:

• 1. Power reset: Unplug for 5 minutes, then plug back in. Test several keys. If only some keys fail, the membrane is likely worn.
• 2. Dry out moisture: If the panel was recently cleaned with liquid, leave the door open and allow the unit to dry for several hours, then test again.

Control panel inspection:

• 3. Remove control panel: Unplug the unit. Remove the top grille (OTR) or outer cover (countertop), then remove the screw(s) securing the control panel and gently pull it forward.
• 4. Check ribbon cable: Locate the flat ribbon cable from the keypad to the control board. Carefully disconnect and reconnect it, ensuring it is fully seated and not damaged.
• 5. Visual inspection: Look for corrosion, burn marks, or cracks on the keypad board.

If E6 persists and key response is still erratic, the membrane keypad or complete control panel assembly will need replacement. This is typically a moderate repair that many DIYers can perform with basic tools, but if you are unsure, consult a technician.