Bosch Microwave Error Code E02 — Temperature Sensor Failure
What this means
The E02 error code on Bosch microwaves indicates the internal temperature sensor has failed or is reading values outside the acceptable range. This sensor monitors the oven cavity temperature for safe operation and for sensor cooking programs. The microwave will not operate without a functioning temperature sensor.
Alternate codes: E2
Step-by-step fix
3 stepsReset the microwave
Unplug the Bosch microwave for 5 minutes and plug it back in. A temporary sensor glitch may clear with a power reset.
Bosch microwaves may take up to a minute to fully initialize after being plugged back in — wait for the display to stabilize.
Locate and test the temperature sensor
Unplug the microwave. Remove the outer cabinet cover. SAFETY: Do not touch the high-voltage capacitor. Locate the temperature sensor — on Bosch models, it's typically mounted on the cavity wall. Disconnect and test with a multimeter. Expect approximately 50,000–60,000 ohms at room temperature.
Bosch part numbers often start with '00' — use the full 8-digit number when ordering to avoid getting the wrong part.
Replace the sensor if faulty
If the sensor reads open (infinite) or shorted (near zero), replace it. Remove the mounting hardware, install the new sensor, and reconnect the wires. Reassemble the cabinet.
Bosch uses precision components — always use genuine Bosch replacement parts for best results and warranty compatibility.
When to call a professional
Working inside a Bosch microwave requires careful navigation around the high-voltage capacitor. Professional repair is recommended for all internal component replacements.
Related error codes
The magnetron has overheated and the protection circuit has activated.
Advanced Fix · 30–60 minutes
The door switch circuit is not functioning correctly.
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The inverter board that controls microwave power has failed.
Professional Required · Professional service required
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Oven Temperature Sensor
Part #00626753 · $20–$40
Required if sensor fails resistance testing
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