LG Dryer Error Code F9

What Does Error Code F9 Mean on a LG Dryer?

Thermistor failure — temperature sensor not reading.

The dryer's thermistor (temperature sensor) is not reading correctly. The dryer cannot safely regulate heat without accurate temperature data.

What Causes Error Code F9?

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

1. 1
   Thermistor open circuit (burned out) 60% of cases
2. 2
   Thermistor connector loose 25% of cases
3. 3
   Wiring harness damaged 15% of cases

How to Fix LG Dryer Error Code F9

1. 1

   Test the thermistor

   The thermistor is usually on the exhaust duct inside the dryer. At room temp, test resistance: ~10k ohms expected.

   🔩 Multimeter
2. 2

   Check connector

   Reseat the connector at the thermistor.

3. 3

   Replace thermistor

   A simple pull-and-click replacement if the sensor is accessible.

   🔩 LG dryer thermistor ($15–$35)

   ⚠️ Unplug dryer first.

How to Reset Error Code F9

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

Same Code on Other Brands

Error code F9 appears on these other brands too. Click to compare:

GE Appliances Oven F9

Door latch failure — self-clean lock not completing

Find Replacement Parts

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

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

Frequently Asked Questions