Porsche EV home charger displays E16; internal fan runs at high speed or not at all, and charging may be limited or blocked.

Safety first: Turn off power at the breaker before removing covers. Moving fan blades can cause injury.

• Listen for fan operation: During charging or self-test, you should normally hear the internal fan. If it is silent or unusually loud, suspect a fault.
• Clean vents: Use a vacuum or soft brush to remove dust and debris from all ventilation openings. Do not use compressed air that could drive dust deeper inside.
• Technician fan test: A technician should open the unit, verify that the fan spins freely by hand, and check for obstructions. Measure the fan supply voltage during operation; if voltage is present but the fan does not spin, replace the fan.
• Check fan wiring: Ensure the fan connector is fully seated on the main control PCB and that wires are not pinched or damaged.
• Replace driver circuit if needed: If the fan is good but not being driven, the fan driver circuit on the main control PCB may be defective and require board replacement.