F3 is the code LG microwaves show when the control reads a key as held down. It is usually moisture or a warped membrane, and the owner fix stops firmly at the outside of the cabinet.

Light on, turntable turning, fan humming, food cold. The high-voltage side of the microwave has stopped, and that side is the one part of a kitchen appliance an owner must never open.

LG lists the MHES1738F as a over-the-range microwave in its 1.7 cu. ft. class. On this platform, the F3 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. Service calls on this […]

MVEF1337F is LG’s model number for this over-the-range microwave. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. On this platform, the F3 fault code is one of the more common reasons it gets a service call. Service calls on this microwave most often trace to […]

As a over-the-range microwave, the MVEL2035X shares its core mechanism with the rest of LG’s microwave lineup at roughly 2.0 cu ft. On this platform, the F3 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, […]

LG lists the MVEL2137D as a over-the-range microwave in its 2.1 cu. ft. class. On this platform, the F3 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. Service calls on this […]

As a built-in speed-oven microwave, the MZBZ1715S shares its core mechanism with the rest of LG’s microwave lineup at roughly 1.7 cu ft. On this platform, the F3 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status […]

LMV2015SB is LG’s model number for this over-the-range microwave. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it is exactly the kind of model that has nowhere else to turn for support. On this platform, the F3 […]

As a combination microwave, the LTM9000 shares its core mechanism with the rest of LG’s microwave lineup. On this platform, the F3 fault code is one of the more common reasons it gets a service call. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production […]

The LMV2083SB is an LG over-the-range microwave. Discontinued — LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it is exactly the kind of model that has nowhere else to turn for support. On this platform, the F3 […]