E8 appears and the unit may shut down unexpectedly, often during high load.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Disconnect power before accessing the indoor fan.
Steps:
- Clean fan wheel: Remove the front panel and filters. Shine a light into the blower area and check for heavy dust buildup on the cross-flow fan. If accessible, clean with a soft brush and vacuum.
- Check for obstructions: Ensure no wires or plastic parts are rubbing against the fan wheel.
- Test fan operation: After reassembling and restoring power, run the unit in Fan mode at different speeds. If the fan fails to start or is noisy and slow, the motor may be failing.
Advanced repair: Replacing the indoor DC fan motor on Bosch units usually requires removing the entire indoor chassis from the wall. This is best done by a technician, who can also test the motor and driver circuit on the PCB.
Repair Difficulty
Required Part
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