Defrost Program (Automatic System Only)

Defrost Program (Automatic System Only)

When the defrost program is selected the ATC (automatic temperature control) module:
^ Opens the windshield distribution doors and closes the face and footwell doors.
^ Sets the recirculation doors to the fresh air position.
^ Runs the blower at speed 7.
^ Activates the A/C (air conditioning) compressor.
^ Activates the HRW.
^ Activates the heated windshield (where fitted).

When the ambient temperature is 10 degrees C (50 degrees F) and below, the ATC (automatic temperature control) module signals the coolant valves to remain open. When the ambient temperature is more than 10 degrees F C (50 degrees F), the ATC (automatic temperature control) module checks the existing heater core temperature and, if necessary, increases the open time of the coolant valves to produce a minimum heater core temperature of 30 degrees C (86 degrees F).

The defrost program is cancelled by pressing the defrost switch again, or pressing the automatic, A/C (air conditioning) or maximum A/C (air conditioning) switches.