Error code · Cooktop

LG Cooktop Code F51: Griddle Sensor Reading

Medium · inspection needed

Code: F51
Appliance: Cooktop
Brand: LG
Warranty: 30-day workmanship

What F51 means

F51 appears on LG induction and radiant cooktops and ranges that have a griddle zone, and it reads Griddle Sensor Error. The control cannot get a proper reading from the griddle temperature sensor. The owner sees F51, and the griddle zone may not heat while other zones keep working. Cooktops without a griddle zone do not show this entry, so check that your model has one before relying on this reading.

Common causes of F51

Griddle temperature sensor reading out of range
Sensor wiring or connector
Control board input for the griddle zone

✓ One safe check you can try

1. Let the griddle cool completely and remove any cookware or griddle plate. 2. Cut power at the circuit breaker for half a minute before switching it back on. 3. Set the griddle zone on again to see whether F51 returns. 4. If it continues, stop using the griddle and arrange service.

! Why to stop there

If F51 returns, we test the griddle sensor reading and its connection with the cooktop cold.
We check whether other zones heat normally.
You see the finding and a written price first.

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 Cooktop codes

F3LG Cooktop Code F3: Touch Pad Key Sensor F33, F34LG Cooktop Codes F33 and F34: Front Induction Burner Sensor F52LG Cooktop Code F52: Griddle Sensor Short Detected F56LG Cooktop Code F56: Griddle Heating Problem F59LG Cooktop Code F59: Griddle Not Heating Properly F62LG Cooktop Code F62: Sous Vide Temperature Sensor F69LG Cooktop Code F69: Sous Vide Heating Problem H5LG Cooktop Code H5: Hot Surface Indicator

F51F51 questions

What does a griddle sensor do?

It reports the griddle zone temperature to the control so the zone can be held at the setting you chose. When that reading is not usable, the control shows F51 on the display.

Can I still use the other burners?

Often yes, since the error concerns the griddle zone only. We still suggest a check, because a sensor problem affects how that zone is controlled and how it reacts to your settings.

How do F51 and F52 differ?

F51 is a Griddle Sensor Error, while F52 is Griddle Sensor Short. They are separate entries on the list, so the exact code helps us choose where to test first.

Book a visit

Still seeing F51?

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

(713) 597-5662