ErrorCodeDoctor
LG · Range (Electric)

LG Range (Electric) F42 error code

Difficulty: Hard · Cost: $100–$350 · Duration: 5m

The F42 error means your LG range detected an abnormal voltage condition in the electrical supply. This can be caused by an issue with the home's electrical supply, a power surge, or an internal component fault. A circuit breaker reset clears it in some cases. If F42 keeps returning a licensed electrician should inspect the home's electrical supply before a technician inspects the range's internal components.

Common causes

  • Abnormal voltage detected in the range's electrical circuit
  • Power surge or unstable home electrical supply
  • Internal voltage regulating component has malfunctioned
  • Low voltage supply from the home's electrical panel

How to fix it

  1. 1

    Turn off the circuit breaker for the range and wait 30 seconds

  2. 2

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

  3. 3

    Make sure the range is connected to a properly grounded dedicated circuit

  4. 4

    If F42 persists after resetting a licensed electrician should check the home's electrical supply

  5. 5

    If the electrical supply is correct contact a qualified technician to inspect the range's internal voltage components

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

F42 error — frequently asked questions

What does the F42 error mean on a LG range (electric)?

A voltage error was detected

What causes the F42 error?

The F42 error is usually caused by: Abnormal voltage detected in the range's electrical circuit; Power surge or unstable home electrical supply; Internal voltage regulating component has malfunctioned; Low voltage supply from the home's electrical panel.

Can I fix the F42 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 F42 error?

Fixing the F42 error on a LG range (electric) typically costs $100–$350, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my range (electric) with the F42 error?

We'd recommend addressing the F42 error before continuing to use the range (electric), since hard-rated issues often involve a real fault rather than a minor glitch.