Rest Heating
WARNING: This page is about a different car, the 2009 Land Rover Range Rover, 2008 Land Rover Range Rover, and 2007 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
When the engine is not running, pressing the maximum air conditioning (A/C) switch activates the rest heating function to heat the cabin with residual heat from the engine. The rest heating function activates provided the following conditions exist:
- It is less than 15 minutes since the ignition was selected off.
- Ambient temperature is less than 15°C (59°F).
- On the previous ignition cycle engine temperature exceeded 70°C (158°F).
- Battery voltage is 11.4 V minimum.
To provide the rest heating function, the automatic temperature control (ATC) module activates the auxiliary coolant pump, coolant valves, control door and blower. The automatic temperature control (ATC) module regulates the temperature (to the driver setting selected before the ignition was switched off), opens the face level distribution doors and runs the blower at speed 4.
The rest heating function is cancelled after 15 minutes or when:
- The maximum air conditioning (A/C) switch is pressed again.
- The ignition is selected on.
- Battery voltage decreases to less than 11 V.