EV charger repair, after the simple faults are ruled out

What is ev charger repair?

EV charger repair is electrical diagnosis of a home charging station that will not charge, charges intermittently, or faults under load. The useful order is supply and protection first (breaker, disconnect, GFCI/GFEP behaviour), then the cable and connector, then the wall unit, then the vehicle. Many service calls end at a tripped device or a car setting - which is a good outcome if you find it before ordering a replacement charger.

Signs you need ev charger repair

• The charger was working and now will not start a session
• Charging starts then stops after minutes, especially in rain or heat
• You see an error code on the unit, app or car that keeps returning after a reset
• The breaker trips when charging begins or when another large load starts
• The cable is damaged, the connector latches poorly, or the unit is warm in ways it was not before
• A recent electrical storm, panel work or renovation coincided with the failure

Seeing something not on this list? Browse ev chargers problems by symptom →

How ev charger repair actually works

1. 1

   Capture the symptoms and any codes before resetting everything

   Note lights, app messages, car messages and whether the failure is immediate or after a delay. Then check the breaker and any local disconnect. Random power-cycling without notes erases information the technician needs.

   Watch forA visit where nobody asks what the car displayed. Vehicle-side faults are common and free to check.

2. 2

   Verify supply, grounding and protection devices

   Confirm voltage at the unit, that the breaker matches the circuit design, and that protective devices are operating as intended rather than nuisance-tripping from a real ground fault. Shared circuits and undersized feeds show up here.

   Watch forRepeatedly resetting a breaker that trips under charge. Breakers that trip are messages; forcing them is how wiring damage gets worse.

3. 3

   Inspect cable, connector and mounting

   Strain relief, crushed cables, water in connectors and damaged latches are high-frequency faults - especially on outdoor units. Some cables are field-replaceable; some are integrated.

   Watch forTape on a damaged EV cable as a long-term fix. High-current flexible cords are not extension-cord territory.

4. 4

   Test or replace the EVSE electronics

   If supply and cable are sound, the wall unit is next - internal faults, failed contactors, control boards, network modules. Manufacturer warranty and certified-repair rules vary; some units are board-swap, some are whole-unit.

   Watch forA quote for a full new install when a still-supported unit needs a parts swap. Ask about warranty and parts availability before you approve a tear-out.

5. 5

   Prove a full charge session before closing the ticket

   A reset that "seems fine" is not a repair. A completed session under normal load is. If load management or solar integration is in the system, test with those conditions present.

   Watch forSign-off on a unit that only works when nothing else in the house is running. That is an incomplete diagnosis.

What does ev charger repair cost?

Diagnostic visits sit at the low end; cable replacements and board-level repairs climb; full EVSE replacement with labour sits higher still. If the circuit itself was never adequate, repair quotes should be compared against a proper Level 2 redesign rather than stacking resets - see the installation head page.

See the full ev charger repair cost guide - by material, size and region →

If the number is the problem, here are the ways people pay for it →