LG Oven / Range — Error Code F4
The lower oven thermistor is reporting a fault.
ApplianceDB ranks 1 repair for this code, led by “Clear and reset”. That top fix is an easy DIY job, involving the oven thermistor. Severity is classified as degraded — the appliance keeps running but not correctly.
Ranked repair steps
1. Clear and reset
Press Clear/Off and retry; if the thermistor code persists, cycle the breaker for thirty seconds and request service if it returns.
easy · basis: manufacturer first
Provenance: facts re-derived from an official manufacturer listing — LG USA Support — Range Error Codes List. Meanings and steps are original paraphrase; nothing is reproduced verbatim.