LG Induction Range Flashing 'F' with Stainless Steel... | appliancefaults.com

Technical Background:

The main control unit (MCU) monitors the induction element sensor for proper cookware detection and temperature regulation. The 'F' error typically indicates a fault in the cookware detection circuit or a sensor malfunction. The MCU relies on voltage feedback from the sensor to determine if compatible cookware is present. If the voltage falls outside the expected range, the 'F' error is triggered.

Symptoms:

The LG induction range displays a flashing 'F' error code on the control panel immediately after placing a stainless steel pan on the element. The element fails to heat up.

Possible Causes:

Incorrect cookware material
Cookware not centered on the induction element
Sensor malfunction in the induction element
Surface element control board failure
Improper voltage supply to the unit

Solution:

1

Verify Cookware: Ensure the stainless steel cookware is induction compatible by testing with a magnet. If the magnet doesn't stick firmly, the cookware is not suitable.
2

Center Cookware: Place the pan directly in the center of the induction element.
3

Check Voltage: Using a multimeter, verify the range is receiving the correct voltage (240V AC) at the receptacle.
4

Inspect Sensor: Disconnect power to the range at the breaker panel. Remove the cooktop surface. Visually inspect the sensor underneath the glass cooktop for any damage or loose connections.
5

Test Element: Using a multimeter, test the resistance of the induction element sensor. Refer to the service manual for the proper resistance range. Replace if out of spec.
6

Control Board Check: If the sensor is good, inspect the surface element control board for any burnt components or loose connections. Replace the control board if damage is found.

Safety Warning:

Always disconnect power to the range at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed. Induction ranges operate at high voltages; exercise extreme caution.

Prevention:

Use only induction-compatible cookware. Clean the cooktop surface regularly to remove any debris that could interfere with sensor readings. Avoid placing excessively heavy pots or pans on the cooktop, as this can damage the underlying sensors.

Expert Tip:

Some LG induction ranges have a service mode. Accessing it usually involves a specific button sequence. Check the service manual for the exact procedure. Once in service mode, you can often run diagnostic tests on the individual elements and sensors to pinpoint the source of the error.

Frequently Asked Questions

•What is the correct resistance range for the induction element sensor on this model?

Refer to the LG service manual for the specific resistance range for your model. It typically falls between 50-150 ohms.

•How do I safely remove the glass cooktop surface?

After disconnecting power, remove the screws located around the perimeter of the cooktop. Carefully lift the glass surface, being mindful of any wiring connected to the underside. Some models may have retaining clips that need to be released.

•Where is the surface element control board located, and how do I access it?

The surface element control board is typically located underneath the cooktop surface, near the element causing the issue. Access requires removing the cooktop as described earlier. Be careful of sharp edges inside the unit.

LG Induction Range Flashing 'F' with Stainless Steel Pan: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance range for the induction element sensor on this model?

•How do I safely remove the glass cooktop surface?

•Where is the surface element control board located, and how do I access it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: