Sun Country Highway Unstable Low-Voltage Power Supply

Charger intermittently resets or display flickers during charging.

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.

Possible Causes

Failing capacitors on control board, Loose low-voltage connectors, Electrical noise or surges on supply, Overloaded internal auxiliary power supply

Safety first: Disconnect power before accessing internal electronics.

Check supply stability: Have an electrician verify that the branch circuit voltage is stable and within spec.
Inspect connectors: Reseat all low-voltage connectors between the power supply section, control board, and display.
Look for damaged components: Bulging or leaking capacitors on the control board indicate failure; replace the board.
Surge protection: Consider adding a whole-home or branch-circuit surge protector to protect the EVSE from future surges.

Medium 3/5

Main Control Board

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