Jaguar
Noisy Contactor / Coil Chatter
Charger makes a loud buzzing or chattering noise from inside the unit during charging.
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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
Undervoltage on contactor coil supply, Loose contactor mounting, Worn or pitted contactor contacts, Faulty coil driver on Jaguar PCB causing rapid switching
How to Fix / Troubleshooting
Safety first: Buzzing may indicate arcing; isolate power before opening the unit.
- Step 1 – Observe behavior: Note whether the noise is continuous or only at start/stop of charging.
- Step 2 – Check supply voltage: Have an electrician verify that the control voltage feeding the contactor coil is within Jaguar specifications.
- Step 3 – Inspect contactor: With power OFF, check that the contactor is firmly mounted and that its terminals are tight.
- Step 4 – Replace contactor: If the armature is loose or contacts are badly worn, replace the Jaguar-specified contactor.
- Step 5 – PCB driver check: If the coil is being rapidly switched on/off by the PCB, the driver circuit or firmware may be faulty and require service.
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Repair Difficulty
Hard
4/5
Required Part
Jaguar Wallbox Main Contactor
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