E15
Siemens
Cooling System Control Fault
Microwave shows E15 and may continue to run the cooling fan after programs end.
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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
Stuck cooling fan relay on main PCB, faulty temperature feedback, shorted fan motor drawing excess current, control board logic error
How to Fix / Troubleshooting
Safety warning: Fan and control board repairs involve live mains voltage. Only qualified technicians should access internal components.
User-level steps:
- 1. Allow fan to run: After heavy use, it is normal for the fan to run for a short time. If E15 appears and the fan runs indefinitely, disconnect power.
- 2. Power reset: Unplug the microwave for 10 minutes, then reconnect and test a short cycle.
- 3. Check ventilation: Ensure vents are clear to avoid overheating that can trigger fan control faults.
Technician-level:
- Test the cooling fan motor current draw.
- Check the fan relay on the main PCB for sticking contacts.
- Replace the main control PCB or fan motor if defective.
If E15 persists, professional service is required.
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Repair Difficulty
Hard
4/5
Required Part
Cooling Fan Motor or Main Control PCB
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