Electrical Components - Ford 2003 Mustang Workshop Manual

The A/C compressor will operate if the outside air temperature is above approximately 6°C (43°
F).
The blower motor is on.
DEFROST
When DEFROST is selected:
The air inlet door vacuum control motor is at no vacuum, admitting only outside air into the
passenger compartment.
The panel/floor door and panel/defrost door vacuum control motors are at no vacuum, directing
airflow to the defroster duct and the side window demisters.
The temperature can be adjusted to heat or cool the air below the outside temperature.
The A/C compressor will operate if the outside air temperature is above approximately 6°C (43°
F).
The blower motor is on.

Electrical Components