In my SEL AWD, I get 3.5 mi/kWh on city streets, but my range drops to 3 mi/kWh on the highway at 75 mph. I keep the climate control turned on at all times.
I recently heard an unusual sound while using the heater in my Hyundai Ioniq EV. A buzzing sound is present, and it becomes more noticeable as the fan speed or temperature settings are increased. Is this normal?