F56 Serious Moderate DIY

LG Oven F56 — Griddle overheat

LG Oven · Error code F56

What F56 Means

The griddle temperature exceeded the safety threshold (about 653°F / 345°C) for an extended period. The control shuts the griddle element off.

Symptoms

  • F56 or F-56 on display
  • Griddle was running on high for a long time before fault
  • Griddle dead until cleared

Common Causes

1
Welded griddle relay on cooktop board

Element stays on past setpoint.

2
Shorted griddle sensor reading low

Element ran wide-open because the board thought griddle was cold.

3
Empty griddle on max for too long

No food/oil to absorb heat.

4
Failed cooktop control board

Loss of temperature regulation logic.

How to Fix It

  1. Let the cooktop cool fully — do not retry while hot.
  2. Press CLEAR/OFF and cycle the breaker for 60 seconds.
  3. Avoid running the griddle empty on max; that condition alone can trip F56.
  4. If F56 returns under normal use, measure griddle sensor resistance (~1090 Ω at room temp). Replace if shorted.
  5. If sensor checks good and overheat repeats, the cooktop control board (welded relay) is the next replacement.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement LG griddle sensor View on Amazon→

More LG Oven Codes

5b 5b — Sabbath Mode active (not a fault) CF1 CF1 — Left-front cooktop sensor open/short CF2 CF2 — Left-rear cooktop sensor open/short CF3 CF3 — Right-front cooktop sensor open/short CF4 CF4 — Right-rear cooktop sensor open/short F1 Range F1 — Upper Oven Thermistor Error

All LG codes → All oven codes →

Verified against manufacturer documentation: lgparts.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.