Bosch Oven Error E120
⚡ Quick Answer: The Bosch oven E120 error code indicates a malfunction related to the temperature sensor or a communication issue with the control board. This can lea... ✅ DIY Fixable
What Does Error E120 Mean?
The Bosch oven E120 error code indicates a malfunction related to the temperature sensor or a communication issue with the control board. This can lead to erratic temperature readings and inconsistent cooking results, often occurring after high-temperature cycles. Immediate troubleshooting is advised to prevent further complications.
Common Symptoms:
- Error code 120 appears on the oven display
- Oven may beep before or after the error appears
- Problem often occurs after heating cycle (e.g., at high temperature)
Possible Causes
- Potential oven temperature sensor or control board communication issue (low)
How to Fix Error E120
DIY Fix Basic Oven Reset and Cooling
- Turn the oven off and allow it to cool completely.
- Switch off power at the circuit breaker or unplug for several minutes to perform a reset.
- After reconnecting power, attempt to run the oven again to see whether the error persists.
Technician Only Inspect Temperature Sensor and Control Board
- Disconnect power to the oven.
- Access and visually inspect the internal temperature sensor for damage, loose connection, or disconnection.
- Use a multimeter to measure the temperature sensor resistance if model‑specific values are available.
- Inspect control board connections to the sensor.
- Replace the sensor if readings are out of specification or connector damage is found.
- If sensor and wiring appear correct but error persists, perform diagnostics on the control board and replace if necessary.
Parts needed: Temperature sensor, Control board
- If the error persists after basic reset and cooling attempts
- If user is not comfortable accessing internal components
- If oven displays additional fault symptoms (smoke, unusual noises, or safety interlocks)
Next step
Choose the next step for E120
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Model-compatible Oven parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Non-Scratch Cooktop Cleaner
A routine surface-care product. Confirm that it is approved for the specific glass, ceramic, enamel, or stainless finish.
Oven Thermometer
A diagnostic aid for comparing cavity temperature during a controlled check. It does not prove which internal component has failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | N/A |
|---|---|
| component | Temperature Sensor |
| resistance | 1000-2000 ohms |
| part_number | 00420010 |
| voltage_rating | 120V AC |
Common Questions
What does E120 error mean on Bosch oven?
The E120 error indicates a malfunction with the temperature sensor or control board, leading to erratic temperature readings.
Can I fix Bosch oven E120 error myself?
Yes, you can try a basic oven reset by turning it off and cooling it down. If the error persists, further inspection may be needed.
How much does it cost to fix E120 error?
Repair costs for the E120 error typically range from $150 to $500+, depending on parts and labor.
When should I call a technician for E120?
Call a technician if the error persists after a reset, if you are uncomfortable accessing the oven's internal components, or if you observe additional symptoms.
Sources & References
Data last verified: 2026-07-25
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