GE Microwave Error Code F2: Shorted Thermal Sensor Fix... | appliancefaults.com

Technical Background:

The MCU monitors the resistance of the thermal sensor in the convection cavity to determine the oven temperature. The MCU sends a small DC voltage (typically 5V DC) across the sensor. If the sensor is shorted, the MCU detects an abnormally low resistance, triggering the F2 error code.

Symptoms:

The microwave displays an F2 error code on the control panel, and the convection cooking function may not operate correctly. The microwave may beep repeatedly or shut down unexpectedly.

Possible Causes:

Shorted convection thermal sensor
Faulty wiring harness to the sensor
Damaged MCU (Main Control Unit)
Loose connection at the sensor or MCU
Moisture ingress affecting sensor resistance

Solution:

1

Disconnect power to the microwave at the breaker panel.
2

Locate the convection thermal sensor in the convection cavity (usually at the top or rear).
3

Disconnect the wiring harness from the thermal sensor.
4

Using a digital multimeter, measure the resistance across the sensor terminals. A shorted sensor will read close to 0 ohms. A normal sensor will read a resistance value specified in the service manual (typically several thousand ohms at room temperature, ~70-75°F).
5

Inspect the wiring harness for any signs of damage, such as frayed wires or corrosion. Test the wires for continuity using a multimeter.
6

If the sensor is shorted, replace it with a new thermal sensor that is the correct GE part number.
7

Reconnect the wiring harness to the new thermal sensor and restore power to the microwave. Verify the F2 error is gone.

Safety Warning:

Disconnect the microwave from the power source at the breaker panel before performing any repairs. The microwave contains high voltage components that can cause serious injury or death. Lock Out/Tag Out (LOTO) procedures must be followed.

Prevention:

Avoid excessive moisture exposure in the convection cavity. Regularly clean the interior of the microwave. Check and clean the convection fan filter if equipped.

Expert Tip:

Some GE microwaves have a service mode. Entering this mode might allow you to bypass the error code temporarily for diagnostic purposes, but it's not a permanent fix. Consult the service manual for the specific model to find the service mode entry sequence. This usually involves pressing a combination of buttons on the control panel.

Frequently Asked Questions

•What is the correct resistance range for the convection thermal sensor at room temperature?

The correct resistance range varies by model, but typically falls between 3k ohms to 10k ohms at 70-75°F. Consult the specific service manual for the exact value for your model.

•Where can I purchase a replacement convection thermal sensor?

You can purchase a replacement sensor from appliance parts retailers, online retailers specializing in appliance parts, or directly from GE's parts website. Ensure you order the correct part number for your microwave model.

•How do I access the convection thermal sensor?

Accessing the sensor usually involves removing the microwave's outer casing or an interior panel. Specific instructions vary significantly between models. Refer to the service manual or online repair guides for your particular GE microwave model.

GE Microwave Error Code F2: Shorted Thermal Sensor Fix Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct resistance range for the convection thermal sensor at room temperature?

•Where can I purchase a replacement convection thermal sensor?

•How do I access the convection thermal sensor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: