E05
Princess
Cavity Temperature Sensor / Thermistor Fault
Microwave display shows E05 and unit will not start; sometimes appears after long cooking sessions.
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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.
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Possible Causes
Open or shorted cavity temperature sensor, Loose sensor connector on control board, Damaged wiring harness to sensor, Overheated cavity causing sensor to trip
How to Fix / Troubleshooting
Safety: Unplug the microwave before any inspection. Do not remove the cabinet unless you are qualified.
- Allow cooling: If E05 appears after extended high-power use (e.g., grilling or combination cooking), leave the door open and allow the cavity to cool for 30–45 minutes, then try again.
- Check vents: Ensure all ventilation openings are clear to prevent overheating.
- Power reset: Unplug for 10 minutes, then reconnect and test. If E05 appears immediately on power-up, the sensor or its wiring is likely faulty.
- Professional replacement: The cavity temperature sensor (often mounted on the top or side of the cavity) may need replacement with a Princess-compatible thermistor assembly.
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Repair Difficulty
Hard
4/5
Required Part
Cavity Temperature Sensor
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