ErrorCodeDoctor
LG · Range (Electric)

LG Range (Electric) F20 error code

Difficulty: Hard · Cost: $100–$300 · Duration: 5m

The F20 error means your LG range detected a failure in the lower oven door locking system. This is similar to the F10 error but affects the lower oven instead of the upper. The door lock is required during the self-clean cycle to keep the oven door sealed while temperatures inside reach extremely high levels. When the locking mechanism cannot engage or disengage correctly the oven stops the function as a safety measure. A reset clears it in some cases but if F20 keeps returning the door lock assembly will need to be inspected and replaced by a technician.

Common causes

  • Lower oven door lock motor or mechanism has malfunctioned or failed
  • Door lock assembly is physically obstructed or jammed
  • Wiring connection to the lower oven door lock motor is loose or damaged
  • Temporary electronic glitch causing a false door lock error

How to fix it

  1. 1

    Press the CLEAR/OFF key to clear the error and try the original function again

  2. 2

    If F20 reappears turn off the circuit breaker for the range and wait 30 seconds

  3. 3

    Turn the circuit breaker back on and check if the error has cleared

  4. 4

    If F20 persists after resetting the lower oven door lock assembly needs inspection and replacement by a qualified technician

Related LG Range (Electric) error codes

1

HS

The cooktop surface temperature is above 150°F — too hot to touch

easy
2

H5

The cooktop surface temperature is above 150°F — too hot to touch

easy
3

PF

Power to the range was interrupted

easy
4

Sb

Sabbath mode is active — temperature control, timer, light, and alarm functions are disabled

easy

F20 error — frequently asked questions

What does the F20 error mean on a LG range (electric)?

The lower oven door locking system has failed

What causes the F20 error?

The F20 error is usually caused by: Lower oven door lock motor or mechanism has malfunctioned or failed; Door lock assembly is physically obstructed or jammed; Wiring connection to the lower oven door lock motor is loose or damaged; Temporary electronic glitch causing a false door lock error.

Can I fix the F20 error myself?

This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.

How much does it cost to fix the F20 error?

Fixing the F20 error on a LG range (electric) typically costs $100–$300, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my range (electric) with the F20 error?

We'd recommend addressing the F20 error before continuing to use the range (electric), since hard-rated issues often involve a real fault rather than a minor glitch.