Porsche
No Mains Supply / Internal Power Supply Failure
Porsche EV home charger has no power at all; display is off and no LEDs are lit.
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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
Tripped upstream circuit breaker feeding the Porsche wallbox, Blown internal fuse on wallbox power input board, Failed internal low-voltage power supply module, Loose line or neutral connection at wallbox terminal block
How to Fix / Troubleshooting
Safety first: Before touching the charger or panel, ensure the main breaker is off. Only a qualified electrician should work inside the distribution board.
- Check household breaker: Locate the dedicated breaker for the Porsche wallbox and verify it is in the ON position. If tripped, reset once. If it trips again, do not continue resetting; call an electrician.
- Verify other loads: Confirm that other circuits in the home have power to rule out a general outage.
- Inspect external disconnect (if present): Ensure any local disconnect switch near the wallbox is turned on.
- Technician internal check: An electrician should remove the wallbox cover, check for voltage at the input terminals, inspect the internal fuse, and test the low-voltage power supply module. Replace the fuse only after identifying and correcting the cause of failure; replace the power supply module if it has no output.
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Repair Difficulty
Medium
3/5
Required Part
Internal low-voltage power supply module
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