Error code reference

LG Range Error Code F4

Main oven temperature sensor shorted - oven thermistor is shorted for over 1 minute after cook starts.

SourceLG 30" Freestanding Electric Range - Service Manual (LRE30453)7-0, 7-5 to 7-6

Diagnostic procedure

The full F4 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Disconnect power, check for loose oven sensor connector, measure sensor resistance (approx. 1.09k ohms at room temp).

SourceLG 30" Freestanding Electric Range - Service Manual (LRE30453)7-0, 7-5 to 7-6

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

49 manuals in the MyPros+ library document this code for LG range.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full F4 procedure

Where this code is documented

Models covered by the manuals that document this code

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