Volkswagen Nuisance Tripping / High Leakage or Short Circuit

VW wallbox trips the house RCD/RCBO or main breaker as soon as charging starts; no specific charger error code visible.

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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

Incompatible upstream RCD type with VW wallbox DC leakage device, Damaged insulation in supply cable, Internal short in power module, Water ingress causing tracking inside charger

How to Fix / Troubleshooting

Safety first: Repeated tripping indicates a potential fault. Do not keep resetting without investigation.

  • Note which device trips: Identify whether the dedicated VW wallbox breaker, an RCD/RCBO, or the main breaker is tripping. This helps diagnosis.
  • Inspect for moisture: Check the charger housing and surrounding wall for signs of water ingress. If suspected, keep power off and call a technician.
  • Disconnect other loads: Temporarily unplug other large appliances to see if combined leakage is causing the trip.

An electrician should verify that the upstream RCD type matches Volkswagen’s installation requirements (often Type A with integrated DC detection in the wallbox), test insulation resistance of the supply cable, and inspect the VW wallbox internals for damage.

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Repair Difficulty

Professional Required 5/5

Required Part

VW wallbox power module
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