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Home >> Ford >> 1995 >> Ranger 4WD V6-245 4.0L >> Repair and Diagnosis >> Heating and Air Conditioning >> Description and Operation >> System Air Flow
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System Air Flow

System Airflow Description

Air is drawn into the system by the blower motor through the outside-recirc. door opening. The air is blown through the A/C evaporator core and then the heater core (when the temperature control is moved toward the WARM position). When the temperature blend door is in the maximum COOL position, the air bypasses the heater core. When the temperature control is moved to the right, away from the maximum COOL position, air passes through the heater core where it is warmed, arid then mixed with the cool air before it is discharged through the registers.

OFF

With the function selector in the OFF position, the outside-recirc. door is in the recirculated air position. It is closed to outside air and no air passes through the system. The blower motor is off.

MAX A/C

NOTE: No temperature modulation is possible in the MAX A/C position.

In the MAX A/C position, the outside-recirc. air door is in the recirculated air position. All of the air discharges through the panel registers except for a small amount of floor bleed. The A/C compressor operates in this function control setting.

PANEL/FLOOR

In the PANEL/FLOOR position, the outside/recirc. air door is open to outside air (no vacuum). Air is discharged through the heater outlet floor ducts and panel registers. The A/C compressor will engage in this mode if outside air temperatures are above approximately 10°C (50°F).

NORM A/C

In the NORM A/C position the outside-recirc. air door is open to the outside (no vacuum) and outside air is discharged through the panel register with a small amount of floor bleed. The A/C compressor operates in this control setting.

PANEL

In the PANEL position the outside-recirc. air door is open to the outside (no vacuum), and outside air is discharged through the panel registers except for a small amount of floor bleed. The A/C compressor does not operate in this control setting.

FLOOR

In the FLOOR position, the outside-recirc. air door is open to outside air (no vacuum). Air is discharged through the heater outlet floor ducts plus a small amount of bleed is directed to the windshield.


DEF/ FLR

In the DEF/FLR position air is discharged through both the windshield defroster hose nozzle and heater outlet floor ducts in approximate equal amounts. (The A/C compressor operates in this control setting when the A/C cycling switch is energized.

DEFROST

In the DEFROST position the air is discharged through the windshield defroster hose nozzles. There is also a small amount of floor bleed. The A/C compressor operates in this control setting to help dehumidify the air.


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