GE Profile Oven Error Code F350: Thermal Fuse... | appliancefaults.com

Technical Background:

The oven's Main Control Unit (MCU) monitors the oven temperature sensor. The thermal fuse is a safety device that opens the circuit if the oven overheats, preventing a fire. The F350 error indicates that the MCU has detected an open thermal fuse circuit. The voltage path involves 120V AC being supplied to the heating element, controlled by a relay on the MCU and monitored by the thermal fuse in series.

Symptoms:

The GE Profile oven displays error code F350. The oven may not heat up, or it may overheat and then shut down.

Possible Causes:

Blown thermal fuse due to oven overheating.
Faulty oven temperature sensor providing incorrect readings.
Defective oven control board (MCU) not regulating temperature correctly.
Wiring harness issue causing intermittent short circuit to the thermal fuse.
Stuck relay on the control board keeping the heating element energized.

Solution:

1

Disconnect power to the oven at the breaker panel.
2

Locate the thermal fuse, typically on the back panel of the oven cavity. It's a small, white ceramic or plastic component with wires attached.
3

Use a multimeter set to continuity to test the thermal fuse. If the meter does not show continuity, the fuse is blown and needs replacement.
4

Before replacing the fuse, inspect the oven temperature sensor using a multimeter. It should read around 1080 ohms at room temperature (70°F). Significant deviation indicates a faulty sensor.
5

Inspect the wiring harness connected to the thermal fuse and temperature sensor for any signs of damage or loose connections.
6

Replace the thermal fuse with an exact replacement part. Use a 1/4-inch nut driver.
7

Reconnect power and test the oven operation. Monitor the oven temperature using an external thermometer to ensure proper heating.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out / Tag Out (LOTO) procedures should be followed. The oven operates on 120V AC and 240V AC, which can cause serious injury or death.

Prevention:

Avoid setting excessively high oven temperatures for extended periods. Regularly clean the oven to prevent grease buildup, which can contribute to overheating. Schedule annual appliance checkups with a qualified technician.

Expert Tip:

After replacing the thermal fuse, run the oven through a self-clean cycle and carefully monitor for any unusual odors or noises. If the fuse blows again shortly after replacement, the oven control board or temperature sensor is likely the culprit. Service mode can be entered by pressing and holding the Bake and Broil buttons simultaneously for 5 seconds, allowing temperature calibration adjustment.

Frequently Asked Questions

•What is the resistance range for a functioning oven temperature sensor at room temperature?

A functioning oven temperature sensor should read approximately 1080 ohms at room temperature (70°F). A significant deviation from this range indicates a faulty sensor.

•How do I access the oven's service mode for temperature calibration?

To access the service mode, simultaneously press and hold the Bake and Broil buttons for 5 seconds. This will allow you to adjust the oven's temperature calibration.

•What could cause the thermal fuse to blow repeatedly after being replaced?

Repeated thermal fuse failures often indicate a problem with the oven control board (MCU) or a faulty oven temperature sensor causing the oven to overheat. The heating element relay could also be stuck in the on position.

GE Profile Oven Error Code F350: Thermal Fuse Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the resistance range for a functioning oven temperature sensor at room temperature?

•How do I access the oven's service mode for temperature calibration?

•What could cause the thermal fuse to blow repeatedly after being replaced?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: