Error code · Range

LG Range Codes F8 and F18: Meat Probe Circuit

Low risk · DIY check OK

Code: F8, F18
Appliance: Range
Brand: LG
Warranty: 30-day workmanship

What F8, F18 means

F8 and F18 appear on LG electric and gas ranges and wall-oven-style cooking appliances that use a numeric F-code display. Both codes are shown as an Oven Meat Probe Error, which means the control is not getting a normal reading from the temperature probe circuit. The owner sees the code on the display and probe-based cooking may not run, while ordinary bake and broil often still work. The code is more of an interruption than a danger.

Common causes of F8, F18

Probe jack and receptacle inside the oven cavity
Probe cable and sensing element
Probe input circuit on the oven control

✓ One safe check you can try

1. Press CLEAR/OFF, then start the same function once more. 2. If the code returns, switch the range's circuit breaker off for 30 seconds, then back on. 3. Once the oven has cooled, wipe food residue from around the probe receptacle with a damp cloth. 4. If F8 or F18 still shows, cook without the probe and arrange service.

! Why to stop there

After the reset we still cannot tell whether the probe itself or the oven's probe circuit is the cause.
We test with the oven's own readings and confirm the cause before you approve a written price.
Our repairs come with a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Range codes

F4, F5LG Range Codes F4, F5: Lower Oven Temperature Probe F42LG Range Code F42: Supply Voltage F45, F46LG Range Codes F45, F46: Fan Not Running F6LG Range Code F6: Upper Oven Heat F7LG Range Code F7: Upper Convection Fan F10LG Range Code F10: Upper Oven Door Lock F9LG Range Code F9: Upper Oven Heating Problem F11LG Range Code F11: Control Communication

F8, F18F8, F18 questions

Can I bake without the meat probe when F8 shows?

Many owners keep using normal bake and broil and just skip probe cooking. If any function stops or the code stays on the display, stop using the oven and call us so we can check the probe circuit.

Is F18 different from F8?

LG lists both as an Oven Meat Probe Error, so we treat them as the same condition. We check the probe receptacle, cable, and the control's probe input in the same visit.

Should I buy a new probe first?

Not necessarily. A new probe will not help if the receptacle or oven control is the cause. We would rather test the circuit first, then quote the right part in writing.

Book a visit

Still unsure about F8, F18?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662