LG · Microwave

LG Microwave 12H error code

Difficulty: Easy · Cost: $0 · Duration: 1m

12H is not an error code. It simply means the microwave clock has not been set yet and is prompting you to choose between 12-hour (AM/PM) or 24-hour (military time) clock mode. This typically appears after a power outage or when the microwave is first set up. Setting the clock takes about a minute and requires no tools.

Common causes

Clock was reset after a power outage or interruption
Microwave was newly installed and the clock has not been set yet

How to fix it

1

Open the microwave door
2

Press the + button repeatedly to toggle between 12H and 24H clock mode
3

Press ENTER to confirm the clock mode
4

Press + or - to select the desired hour then press ENTER to set it
5

Press + or - to select the desired minutes then press ENTER to finish setting the clock