E5 appears and the compressor does not start or stops shortly after starting.
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: This is a high-voltage, high-current fault. Do not attempt to open the outdoor electrical compartment unless you are qualified.
User checks:
- Verify supply voltage stability: Ensure the AC is not connected through undersized extension cords or overloaded circuits. The Bosch unit should have a dedicated circuit as specified in the manual.
- Inspect power connections (visual only): With power off, remove the outdoor service cover and look for burnt wiring or melted insulation at the terminal block. Do not touch exposed conductors.
Technician actions: A Bosch technician will measure compressor winding resistance, check for ground faults, verify current draw, and test the inverter module. Depending on findings, the compressor or outdoor inverter PCB may need replacement.
Repair Difficulty
Required Part
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