Microwave Touchpad Not Working? How to Fix It

When a microwave touchpad is not working, some buttons do not respond or the pad is dead. Usually, a worn membrane switch or a failed control board is the cause. First, test whether one area or the whole pad fails. Then, decide between the membrane and the board below.

Safety first. Unplug the microwave before you open the cabinet. The high voltage capacitor can hold a lethal charge long after you unplug the unit, so it must be discharged before any internal work. Because of this shock hazard, leave the magnetron, high voltage diode, and capacitor to a qualified technician. Never run the microwave empty.

Parts to inspect for a microwave touchpad that is not working

1. Membrane Switch

The membrane switch, or touchpad, is the panel that sends your key presses to the control board. When it wears out, some buttons stop working or the pad does not respond at all. So test whether one area or the whole pad fails. Replace the membrane switch, or the panel it is part of, if the pads no longer register.

Unplug the microwave before you reach this part, and have the high voltage capacitor discharged first, since it can hold a lethal charge even when unplugged.

2. Control Board

The control board reads the touchpad and runs the microwave, switching the relays for the magnetron, motor, and fan. When it fails, the unit may not respond, may not start, or may act at random. Therefore, confirm the touchpad is good first, then look at the board for burnt spots and dead relays. Replace the board if it no longer controls the unit.

Unplug the microwave before you reach this part, and have the high voltage capacitor discharged first, since it can hold a lethal charge even when unplugged.

Reset the control before you replace parts

Before you replace the panel, try a full reset. First, unplug the microwave for a minute, then plug it back in and test the pad. Next, press each button and note which ones fail. Because a single dead area points to the membrane and a full lockout points to the board, this quick check tells you which part to order.

Get the parts

We supply OEM and replacement parts in bulk. Browse the Appliance Parts catalog, or request a bulk quote for volume orders.

Is the microwave old or failing often? So weigh a repair against a new unit, and browse complete microwaves and more when a replacement makes more sense.

Most of the time, a microwave touchpad that is not working traces back to one worn part. So replace it, then run a short test with a cup of water and confirm the fix.