GE Café Induction Cooktop: Blank Display and... | appliancefaults.com

Technical Background:

The GE Café induction cooktop relies on a main control unit (MCU) to manage its functions, including the display. The MCU receives power from a power supply board, which converts 120V AC to the necessary DC voltages. The display receives signals from the MCU to show settings and feedback. The high pitched hum suggests a power supply issue.

Symptoms:

US homeowner reports a GE Café induction cooktop with a completely blank display and a noticeable high-pitched humming sound emanating from within the unit.

Possible Causes:

Failed main control board
Defective power supply board
Loose wiring harness connection to display
Overheating causing thermal protection to engage
Incompatible line voltage

Solution:

1

Disconnect power to the cooktop at the breaker panel.
2

Using a 1/4-inch nut driver, remove the cooktop from the counter.
3

Carefully inspect all wiring connections for looseness or damage, especially to the display.
4

Locate the main control board and power supply board. Check for any visible signs of damage like burnt components or bulging capacitors.
5

Using a multimeter, test the voltage output of the power supply board. Refer to the wiring diagram for correct voltage values. Typically you should see 5V DC, 12V DC and possibly 24V DC.
6

If the power supply output is incorrect, replace the power supply board. If the power supply output is correct, replace the main control board.
7

Reconnect the cooktop, restore power and verify proper operation.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before attempting any repairs. Lock Out/Tag Out (LOTO) procedures are essential to prevent accidental electrocution. High voltage is present within the cooktop.

Prevention:

Ensure proper ventilation around the cooktop. Avoid placing objects on top of the unit that could block airflow. Regularly clean the cooktop surface to prevent spills from entering the unit.

Expert Tip:

On some GE models, holding the 'Timer' and 'Power' buttons simultaneously for 5 seconds enters service mode. This mode can provide diagnostic codes and allow testing of individual components.

Frequently Asked Questions

•Where can I find the wiring diagram for this model?

The wiring diagram is usually located inside the cooktop, often attached to the back panel or underneath the unit. You can also find it on the GE service website or through a parts supplier.

•How do I test the thermistor on the induction coil?

Using a multimeter set to ohms, disconnect the thermistor. Measure the resistance. Compare the reading with the thermistor's resistance chart (available in the service manual) at room temperature (around 70F). Significant deviation indicates a faulty thermistor.

•What is the proper AC line voltage for this cooktop?

This cooktop is designed to operate on 208-240V AC. Using a multimeter, verify the voltage at the cooktop receptacle. Voltage outside this range can cause malfunctions and damage.

GE Café Induction Cooktop: Blank Display and High-Pitched Hum Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where can I find the wiring diagram for this model?

•How do I test the thermistor on the induction coil?

•What is the proper AC line voltage for this cooktop?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: