Microwave shows F2 and may stop mid-cycle; keypad may still respond.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the microwave.
Locate and test sensor:
- Remove the outer cabinet and locate the cavity thermistor or temperature sensor (often mounted on the cavity wall or top).
- Disconnect the sensor and measure its resistance at room temperature. Compare to Emerson service specs (typically in the tens of kilo-ohms). An open or near-zero reading indicates failure.
- Inspect the wiring harness for damage or loose connections.
Replace if faulty: Install a new thermistor rated for your specific Emerson model. Reassemble and test. If F2 persists with a known-good sensor, the control board may be defective.
Repair Difficulty
Required Part
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