E601
Bosch
Surge Protection / MOV Failure
Bosch EV charger shows E601 and refuses to start; error appears after a lightning storm or surge event.
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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
Failed metal-oxide varistor (MOV) on input, Damaged internal surge suppression components, Severe utility surge, Incorrect line voltage connection
How to Fix / Troubleshooting
Safety first: Turn OFF the breaker and do not attempt to use the charger until it has been inspected. Surge damage can leave components in an unsafe state.
- Inspect surroundings: Check if other electronics in the home were affected by the same event. This supports a surge diagnosis.
- Do not repeatedly reset: Avoid cycling power repeatedly; this can stress partially damaged components.
- Electrician check: Have an electrician verify correct line-to-line voltage and proper polarity at the charger feed.
- Internal repair: Replacement of MOVs and surge components requires opening the unit and should be done by a Bosch-authorized technician. Often, the entire main control board is replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Input Surge Protection / Main Control Board
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