EV Charger Showing Error Light
- How urgent
- Caution
- Who fixes it
- An electrician
What's happening?
EV chargers use LED lights and displays to communicate their status. A red light or error indication means the charger has detected a fault and has stopped or will not start charging as a safety precaution. The specific pattern or code varies by manufacturer.
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What usually causes it?
- Earth fault detected by the charger's internal RCD
- Over-temperature: charger has overheated
- Communication error between charger and vehicle
- Supply fault: voltage or frequency out of range
- Internal hardware fault: relay, contactor, or sensor failure
- Charger firmware error requiring a restart or update
Is it dangerous?
The error light means the charger has detected a potentially unsafe condition and has protected you by stopping. This is the charger working as designed. Do not attempt to bypass the error. If the error is an earth fault or over-temperature warning, the charger should be checked before resuming use.
Can I fix it myself?
Note the exact light colour, pattern, and any error codes. Check the manufacturer's app and manual for what the error means. Try restarting the charger by switching the isolator off for 60 seconds and back on. Check the charging cable for damage. If the error is temperature-related, wait for the charger to cool down: direct sunlight on a hot day can cause overheating.
When should you call an electrician?
Call an electrician if the error persists after restarting, if the error code indicates an earth fault, if the charger shows a hardware error that the manufacturer confirms needs an electrical inspection, or if the error appeared after a power surge or electrical work on the property.
What will the electrician actually do?
- Read and interpret the charger error codes
- Test the supply circuit for voltage, frequency, and earth integrity
- Check the charger's internal protection devices
- Inspect wiring connections for heat damage or looseness
- Liaise with the manufacturer for diagnosis and potential warranty replacement
- Replace or repair the charger if the fault is confirmed as a hardware issue
Who fixes this
What it usually costs
- Electrical Fault Finding Cost
- Priced on survey
Questions people ask
What does a red light on my EV charger mean?
Can I ignore the error and keep charging?
Should I contact the manufacturer or an electrician?
Could a power surge damage my EV charger?
Sources & References
Before you book, read how to check an electrician is qualified.
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