GE Profile Oven Error F350: Troubleshooting High... | appliancefaults.com

Technical Background:

The oven control board (MCU) monitors the oven temperature using an RTD (Resistance Temperature Detector). The RTD's resistance changes with temperature. The MCU reads this resistance and controls the heating elements to maintain the set temperature. Error F350 indicates that the MCU detects an out-of-range or erratic signal from the RTD, specifically at high temperatures. This can be due to a failing RTD, wiring issues, or a faulty MCU.

Symptoms:

The GE Profile oven displays error code F350 only when baking at high temperatures (e.g., above 400°F). The oven may function normally at lower temperatures. The error may appear intermittently.

Possible Causes:

Oven temperature sensor (RTD) malfunction at high temperatures.
Wiring harness issues between the RTD and the oven control board.
Faulty oven control board (MCU) unable to correctly read the RTD signal.
Excessive oven temperature exceeding safe limits.
Loose connection at the RTD or the oven control board.
Weakened solder joint on the oven control board related to the RTD circuit.

Solution:

1

Disconnect power to the oven at the breaker panel. Lock Out/Tag Out (LOTO) procedures must be followed.
2

Locate the oven temperature sensor (RTD) inside the oven cavity, usually at the rear. Remove the sensor.
3

Using a multimeter, measure the resistance of the RTD at room temperature (approx. 77°F). It should be around 1080 ohms. Use the manufacturer’s RTD resistance chart. Heat the sensor carefully with a heat gun (low setting) and observe the resistance change. If it doesn't change smoothly or shows erratic jumps, replace the RTD.
4

Inspect the wiring harness connecting the RTD to the oven control board for any signs of damage, such as frayed wires or loose connections. Repair or replace as needed.
5

Access the oven control board (MCU). Visually inspect the board for any signs of damage, such as burnt components or loose solder joints, specifically in the RTD circuit area.
6

Check the voltage at the RTD input on the oven control board with the oven set to bake at a low temperature (e.g., 350°F). Consult the service manual for the correct voltage readings. If incorrect, the MCU may be faulty and require replacement.
7

Reassemble the oven and test the baking function at various temperatures. Monitor for error code F350.

Safety Warning:

Disconnect power to the oven at the breaker panel before performing any repairs. High voltage is present when the oven is powered on. Lock Out/Tag Out (LOTO) procedures are mandatory to prevent accidental energization.

Prevention:

Regularly clean the oven to prevent grease buildup, which can affect temperature readings. Inspect the RTD and wiring harness periodically for any signs of damage. Avoid extreme temperature fluctuations when baking.

Expert Tip:

Some GE Profile ovens have a service mode that allows you to monitor the oven temperature sensor readings in real-time. Refer to the service manual for the specific key sequence to enter service mode and access the temperature sensor data. This allows you to observe the RTD values directly while the oven is heating up, which can help pinpoint intermittent sensor failures.

Frequently Asked Questions

•What is the typical resistance range for a GE oven RTD sensor at room temperature?

The typical resistance range for a GE oven RTD sensor at room temperature (around 77°F) is approximately 1080-1100 ohms. Always consult the specific service manual or RTD resistance chart for the exact values for your model.

•How do I access the oven control board (MCU) on a GE Profile oven?

The oven control board is typically located behind the control panel. You usually need to remove screws from the top or front of the control panel to access it. Disconnect power before attempting to access the control board. Consult the service manual for specific instructions for your model.

•If the RTD resistance readings are within the specified range, what else could be causing the F350 error?

If the RTD resistance readings are within range, the issue might be a faulty oven control board (MCU) that's misinterpreting the signal or a wiring issue between the RTD and the control board. Check for loose connections or damaged wires. The MCU may need to be replaced.

GE Profile Oven Error F350: Troubleshooting High Temperature Bake Issues

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for a GE oven RTD sensor at room temperature?

•How do I access the oven control board (MCU) on a GE Profile oven?

•If the RTD resistance readings are within the specified range, what else could be causing the F350 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: