PCB Temp Error
E303
Electronics Delta temperature too high. Temperature sensor on the control module detects temperature changes that, over time, are higher than limit value. Control turns off heating elements and fan defaults to high speed. When cavity temperature reaches 212°F/100°C, heating will resume and error will be cleared. (If self-clean was running, it will be disabled until a control reset is performed.)
Bosch Oven E303 Error Code Error Code Possible Causes
- The cooling fan is defective.
- The control module is defective.
- Poor ventilation
- Wiring issue.
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This information is provided for educational purposes only. Please consult the appropriate Service Mode or Technical Document for your model. Always take proper safety precautions when installing or repairing any major appliance.