Symptom Chart

WARNING: This page is about a different car, the 2003 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
Incorrect/erratic direction of airflow from outlet(s)	No vacuum to the function selector switch. The function selector switch leaks vacuum. Kinked/pinched vacuum hose. Leaking vacuum control motor. Leaking A/C vacuum check valve. Leaking A/C vacuum reservoir tank and bracket. Vacuum actuator arm not connected to the door crank.	GO to PINPOINT TEST A .
Insufficient, erratic, or no heat	Low engine coolant level. Engine overheating. Plugged or partially plugged heater core. Inoperative A/C blend door. Temperature control cable.	GO to PINPOINT TEST B .
The air conditioning (A/C) does not operate/does not operate correctly	Battery junction box (BJB) fuse 17 (15A). Central junction box (CJB) fuses: 2 (5A). 7 (10A). 9 (3A). Circuitry. A/C clutch relay. A/C cycling switch. A/C system discharged/low charge. Function selector switch.	GO to PINPOINT TEST C .
The air condtioning (A/C) is always on	Circuitry. A/C clutch relay. Function selector switch.	GO to PINPOINT TEST D .
Insufficient air conditioning (A/C) cooling	Restricted A/C evaporator core orifice. Low refriderant level. Inoperative A/C cycling switch. Inoperative cooling fans.	GO to PINPOINT TEST E .
No operation in all the temperature settings	Temperature select control. Heater temperature cable. Disconnected heater temperature cable. Air temperature control door.	GO to PINPOINT TEST F .
The blower motor does not operate/does not operate correctly	Battery junction box fuse 23 (40A). Circuitry. Blower motor switch. Blower motor resistor. Blower motor relay. Blower motor.	GO to PINPOINT TEST G .
The blower motor operates continuously in high speed	Circuitry short/open. Blower motor resistor. Blower motor switch.	GO to PINPOINT TEST H .
No operation in high blower setting	Blower motor resistor. Blower motor switch.	GO to PINPOINT TEST I .
No operation in lower speeds	Circuitry short/open. Blower motor resistor. Blower motor switch.	GO to PINPOINT TEST J .
The engine cooling fan does not operate/does not operate correctly	Battery junction box (BJB) fuses: 25 (40A). 26 (40A). Central junction box (CJB) fuses: 7 (10A). 9 (3A). Circuitry. A/C clutch relay. A/C pressure transducer.	REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE .