SE Moderate Moderate DIY

LG Microwave SE — Stuck key / shorted touchpad

LG Microwave · Error code SE

What SE Means

SE (Sensor / Stuck Error) indicates the control has seen a touch input held continuously. Almost always a moisture or membrane issue on the touch panel.

Symptoms

  • SE on display, sometimes alternating with a beep
  • Keypad partially or fully unresponsive
  • Comes back shortly after cooking food with steam

Common Causes

1
Moisture under touchpad

Steam vented onto the control panel and condensed behind the membrane.

2
Defective touchpad / keypad

Membrane traces have shorted from age.

3
Control board fault

Keypad scan input on the PCB has failed (rare).

How to Fix It

  1. Unplug the microwave for 10–30 minutes to dry out any condensation.
  2. Avoid venting steaming pots directly under an over-the-range unit.
  3. If SE returns after drying, remove the control panel and disconnect the keypad ribbon — if the code clears with keypad disconnected, replace the keypad.
  4. If the code persists with the keypad unplugged, replace the main control board.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement LG microwave touchpad / keypad View on Amazon→ Common replacement LG microwave main control board View on Amazon→

More LG Microwave Codes

CH CH / Child Lock — Control locked DOOR DOOR / Door Error — Door switch / interlock fault EE EE — EEPROM / control memory error F-1 F-1 — Oven sensor open / thermistor fault F-2 F-2 — Keypad / touch panel shorted F-3 F-3 — Key short / specific button stuck

All LG codes → All microwave codes →

Verified against manufacturer documentation: lg.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.