Error code · Cooktop

LG Cooktop Code F59: Griddle Not Heating Properly

Medium · inspection needed

Code: F59
Appliance: Cooktop
Brand: LG
Warranty: 30-day workmanship

What F59 means

F59 appears on LG induction and radiant cooktops and ranges with a griddle zone, and it reads Griddle Is Not Heating Properly. The control compares what the griddle zone should be doing with what it reads, and the two do not match. The owner sees F59, and the griddle may stay cool or warm up poorly while other zones keep heating. It is listed apart from F56 and the two sensor entries, so the exact code helps us pick the first test.

Common causes of F59

Griddle zone output below what the control expects
Griddle temperature sensor reading
Wiring or connector at the griddle zone
Control board output

✓ One safe check you can try

1. Let the cooktop cool and take off the griddle plate and cookware. 2. Power the cooktop down at the breaker for a short 30-second pause and restore it. 3. Set the plate back flat and try the zone again. 4. If F59 returns, stop using the griddle and arrange service.

! Why to stop there

If F59 comes back, we measure the zone output and the sensor reading side by side.
We look at the wiring and connector with the power off.
We tell you the finding and quote in writing 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 F51LG Cooktop Code F51: Griddle Sensor Reading F52LG Cooktop Code F52: Griddle Sensor Short Detected F56LG Cooktop Code F56: Griddle Heating Problem F62LG Cooktop Code F62: Sous Vide Temperature Sensor F69LG Cooktop Code F69: Sous Vide Heating Problem H5LG Cooktop Code H5: Hot Surface Indicator

F59F59 questions

How is F59 different from F56?

Both concern the griddle heating, but they are separate entries on the error list. The exact code you see tells us where to start our tests, so please note which one appears.

Will the griddle heat if I wait longer?

If the control has found the zone is not heating properly, waiting rarely changes it. A breaker reset may clear a momentary event, and a code that keeps returning needs a proper test.

Is it safe to touch the griddle after F59?

Treat it as hot until it has cooled. The code says it is not heating properly, but leftover heat may still be in the plate, so let it cool completely before you lift it.

Book a visit

Still seeing F59?

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

(713) 597-5662