f21
Moderate
LG · Ovens & Ranges
Gas valve error - gas valve not operating properly (gas models)
Quick Answer
Error code F21 on your LG Ovens & Ranges means: Gas valve error - gas valve not operating properly (gas models). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Step 1: Turn off the circuit breaker and the gas supply valve behind the range.
2
Step 2: This error indicates the gas valve is not operating as expected by the control board.
3
Step 3: Do NOT attempt to repair gas components yourself unless you are qualified.
4
Step 4: Contact a qualified technician or LG service to inspect and replace the gas safety valve.
5
Step 5: The technician will check the valve solenoids, wire harness, and control board signal.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Gas safety valve
Gas valve solenoid
Wire harness
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