LG Dishwasher Code F31: Heat Dry Fan
F31 appears on LG dishwashers with Dynamic Heat Dry. It means the heat dry fan motor does not operate. That fan moves warm air through the tub at the end of the cycle to dry the…
- Code
- F31
- Appliance
- Dishwasher
- Brand
- LG
- Warranty
- 30-day workmanship
What F31 means
F31 appears on LG dishwashers with Dynamic Heat Dry. It means the heat dry fan motor does not operate. That fan moves warm air through the tub at the end of the cycle to dry the dishes. When it does not run, the wash itself may finish, but the dishes come out wet, and the control shows the code. Codes can differ by model. Because the fan sits inside the machine, this is a repair we handle rather than an adjustment you can make at home.
Common causes of F31
- Heat dry fan motor
- Fan wiring or connector
- Control output to the fan
1. Let the dishwasher finish the cycle and open the door. 2. Make sure nothing is blocking the area near the door vent. 3. Do not open any panels or reach into the vent. 4. Note whether the dishes come out wet. 5. Call us and give us the model number.
- We check whether the fan is getting power and whether it turns.
- A fan that turns by hand but not under power points to the control, not the motor.
- We confirm the dry stage works before we finish.
Other Dishwasher codes
Can I still wash dishes with F31?
Often the wash still works, but the dry stage may not. Check whether dishes come out wet. You can wash by hand or towel dry until we repair it.
Is F31 dangerous?
It is not a safety alarm, but the fan is part of the drying system and the dishwasher should not be left showing it. Stop using it and book a visit.
Do I need the model number?
It helps. Dynamic Heat Dry models have the fan, and codes can differ by model, so the model number lets us bring the right part.
Still seeing F31?
A technician diagnoses it on site and gives you the price in writing before any work starts.