Sun Country Highway
No Power / Input Supply Failure
Charger completely dead – no LEDs, no display, no relay click when vehicle is plugged in.
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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
Tripped or open breaker feeding the charger, Loose or disconnected line conductors at input terminal block, Blown internal fuse on control board, Failed internal low-voltage power supply
How to Fix / Troubleshooting
Safety first: Treat all wiring as live until proven otherwise. Use a qualified electrician if unsure.
- Check breaker: Locate the dedicated breaker for the Sun Country Highway charger and ensure it is in the ON position. If tripped, reset once. If it trips again immediately, do not force it; investigate for shorts.
- Verify line voltage at EVSE: With a multimeter and appropriate PPE, measure voltage at the EVSE input terminals. If no voltage is present, correct the upstream wiring or breaker issue.
- Inspect internal fuse: With power off, open the unit and look for any internal fuses on the control board or power entry. Test and replace with the exact type and rating if blown. A repeatedly blowing fuse indicates a deeper fault.
- Check low-voltage supply: If line voltage is present and fuses are good but the display remains dark, the internal low-voltage power supply on the control board may have failed. Replace the control board assembly.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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