Audi No Mains Power / Internal Power Supply Failure

Audi EV home charger does not power on at all; no LEDs or display, and the app cannot find the charger.

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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 or faulty circuit breaker feeding the charger, Loose or disconnected supply wiring at wallbox terminal block, Blown internal fuse on power board, Failed low-voltage power supply on main control board

How to Fix / Troubleshooting

Safety first: Before any work, switch off the main breaker feeding the charger. Only a qualified electrician should open the wallbox or work on live circuits.

  • Check upstream breaker and RCD: Verify that the dedicated breaker and any upstream RCD/RCBO are in the ON position and have not tripped. Reset if necessary and observe whether they trip again immediately.
  • Test outlet/supply: If the charger is plug-in, test the outlet with another high-load device. For hardwired units, an electrician should measure voltage at the wallbox supply terminals.
  • Inspect internal fuse: With power off and cover removed by a professional, locate any internal fuses on the power board. Replace blown fuses only with identical type and rating, and investigate why they blew.
  • Check low-voltage supply: A technician can measure the 5 V/12 V rails on the main board. If missing, replace the power supply module or main control board as per Audi service documentation.

If breakers trip repeatedly or internal fuses blow again, stop using the charger and have it professionally inspected for short circuits or component failure.

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Repair Difficulty

Hard 4/5

Required Part

Internal Power Supply Module
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