The algorithm for the heater control is as follows:
Heater control is active if all of the following are true:
- Ambient temperature is less than or equal to -5C
- Battery voltage is not low (25% or higher)
- Charge power is detected.
Once activated, the heater control is deactivated when any of the following is true:
- Ambient temperature is greater than or equal to +5C
- Battery voltage is low (25% or less)
- Charge power is removed.