Bosch Microwave Error Code E3 — Door System Malfunction
What this means
Error E3 indicates an issue with the microwave's door latch or interlock system. The door may not be closing properly, or the door switches may be failing to register a secure close. Microwaves will not operate unless the door is fully closed and all interlock switches confirm it.
Step-by-step fix
4 stepsTurn off and restart
Unplug the microwave for 10 seconds, then plug it back in.
Check the door
Open and close the door firmly several times. Make sure nothing is blocking the door from closing completely.
Check for food residue or debris around the door latch area.
Inspect the door latch
Look at the door hooks (latches) for damage or deformation. Bent hooks won't engage the interlock switches properly.
Check the door seal
Ensure the door gasket is intact and the door sits flush against the microwave body.
When to call a professional
Microwave door switch replacement involves high-voltage capacitor discharge and should only be done by a qualified technician.
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.
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