LG Oven Error Code F1

What Does Error Code F1 Mean on a LG Oven?

Oven temperature sensor open circuit.

The oven temperature sensor (resistance temperature detector) has failed with an open circuit. LG ovens will not heat without a functioning temperature sensor as temperature control becomes unsafe.

What Causes Error Code F1?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

1. 1
   Sensor failure (open circuit) 65% of cases
2. 2
   Connector loose or corroded 25% of cases
3. 3
   Wiring harness damaged 10% of cases

How to Fix LG Oven Error Code F1

1. 1

   Test the sensor

   Disconnect the sensor and test resistance. LG oven sensors read approximately 1,080 ohms at room temperature (75°F). An open circuit (OL/∞) means sensor failure.

   🔩 Multimeter
2. 2

   Check the connector

   Reseat the connector at both the sensor and the control board.

3. 3

   Replace the sensor

   The sensor is in the upper-back of the oven cavity, secured with 1–2 screws.

   🔩 LG oven temperature sensor ($25–$55)

   ⚠️ Allow oven to cool completely before reaching inside.

How to Reset Error Code F1

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

When to Call a Professional

Related Error Codes

Same Code on Other Brands

Error code F1 appears on these other brands too. Click to compare:

Samsung Microwave F-1

Keypad membrane failure — dead or stuck key

Whirlpool Dryer F01

Main control board failure

Maytag Dryer F01

Electronic control board failure

Broan-NuTone Range Hood F01

Heat sensor tripped — oven or cooktop overheating detected

Find Replacement Parts

Use these links to find the exact replacement parts for your LG Oven:

External links — ApplianceErrors.com is not affiliated with these retailers.

Frequently Asked Questions