LG · Microwave Moderate

SE — Stuck key / shorted touchpad

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.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
lg.com ↗

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.

Why it happens

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

  • Moisture under touchpad Steam vented onto the control panel and condensed behind the membrane.
  • Defective touchpad / keypad Membrane traces have shorted from age.
  • Control board fault Keypad scan input on the PCB has failed (rare).

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.

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

More LG microwave codes

CH CH / Child Lock — Control locked DOOR DOOR / Door Error — Door switch / interlock fault F-1 F-1 — Main Control Board Fault F-2 F-2 — Keypad / touch panel shorted F-3 F-3 — Key short / specific button stuck F-4 F-4 — Humidity / steam sensor fault

All LG codes → All microwave codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.