CostolioLG ranges error codes
17 range / oven error codes for LG ranges, what each one means and what to try, paraphrased from LG's own source. Codes vary by model, so confirm in your own manual.
All codes
- F1 Upper oven thermistor error.
- F3 Touch pad key error.
- F6 Upper oven heating error.
- F7 Upper convection fan error.
- F8 Probe error.
- F9 Upper oven is not heating properly.
- F10 Door locking system failure.
- F11 Communication error.
- F16 Oven sensor error.
- F17 Convection fan error.
- F19 Oven heating error.
- F27 Cooling fan stalled during self clean.
- F36 Transistor error.
- F38 Main board to inverter communication error.
- F42 Voltage error.
- HS The cooktop surface is above 150°F (hot surface warning).
- PF Power was interrupted.
F1
What it means: Upper oven thermistor error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F3
What it means: Touch pad key error. This one often needs a licensed technician.
What to try
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F6
What it means: Upper oven heating error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F7
What it means: Upper convection fan error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F8
What it means: Probe error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F9
What it means: Upper oven is not heating properly. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F10
What it means: Door locking system failure. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F11
What it means: Communication error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F16
What it means: Oven sensor error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F17
What it means: Convection fan error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F19
What it means: Oven heating error. This one often needs a licensed technician.
What to try
- Press CLEAR/OFF and try again.
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F27
What it means: Cooling fan stalled during self clean. This one often needs a licensed technician.
What to try
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F36
What it means: Transistor error. This one often needs a licensed technician.
What to try
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F38
What it means: Main board to inverter communication error. This one often needs a licensed technician.
What to try
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
F42
What it means: Voltage error. This one often needs a licensed technician.
What to try
- Turn the breaker off for 30 seconds, then back on.
- Request service if the code returns.
HS
What it means: The cooktop surface is above 150°F (hot surface warning). You can usually fix this yourself.
What to try
- Do not touch the cooktop until the indicator goes off.
PF
What it means: Power was interrupted. You can usually fix this yourself.
What to try
- Press CLEAR/OFF and try the original function again.
- If it reappears, turn the circuit breaker off for 30 seconds, then back on; request service if it continues.
Source
- LG Range Error Codes List (LG US Help Library) (checked 2026-11-02)
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