Subaru LEGACY 2002 Quick Reference Index page 525

! Blower fan starting speed control:
When the blower motor is turned ON in the automatic control mode, the fan speed is initially low
and then gradually increases (applied voltage increases by 1V every second until an appropriate
voltage is reached) to prevent air from blowing out in a gust.
! Blower fan control at low coolant temperatures:
Even when the blower motor is automatically turned ON, the blower fan is kept stopped or allowed
to rotate at the minimum speed for a maximum of 150 seconds depending on the cabin tempera-
ture and the ambient temperature, if the engine coolant temperature is below 49°C with the air out-
lets for the VENT or DEF mode selected.
After the conditions for prohibiting blower fan operation or limiting its speed are removed, the volt-
age applied to the blower motor is increased gradually (by 0.34V every minute) such that a large
amount of cold air does not blow out toward the leg area.
Once the coolant temperature exceeds 49°C, the normal blower fan control is performed including
the starting speed control.
! Blower fan stop control with compressor ON:
The blower fan is stopped for 3 seconds if the compressor is turned ON with the intake sensor-
detected temperature is higher than 35°C.
AUTOMATIC AIR CONDITIONING
AC-53
HVAC System (Heater, Ventilator and A/C)