Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1999WINDSTAR BASE, VAN CARGO, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHVAC SYSTEM - MANUAL
1999 Ford Windstar Base, Van Cargo, 3.8 4
HVAC System - Manual
1999 Ford Windstar Base, Van Cargo, 3.8 4SECTION HVAC System - Manual
- Specifications
- Description
- Operation
- Trouble Shooting
- Notes
- Preliminary Inspection
- Symptom Diagnosis
- Test A: No Communication With Front Electronic Module
- Test B: No Communication With Rear Electronic Module
- Test C: No Communication With Hybrid Electronic Instrument Cluster
- Test D: Improper/Erratic Airflow From Outlets
- Test E: Insufficient, Erratic Or No Heat
- Test F: A/C Does Not Operate Or Does Not Operate Correctly
- Test G: A/C Is Always On
- Test H: Insufficient A/C Cooling
- Test I: No Operation In All Temperature Settings
- Test J: Blower Motor Does Not Operate/Does Not Operate Correctly
- Test K: Main Blower Operates In High Speed Only
- Test L: No Blower Operation In High Blower Setting
- Test M: No Blower Operation In Lower Speeds
- Test N: Auxiliary Blower Motor Does Not Operate/Does Not Operate Correctly
- Test O: Auxiliary Blower Does Not Operate Using Rear Blower Motor Switch
- Test P: Panel/Floor Controls Do Not Operate Using Front/Rear Controls
- Test Q: Temperature Controls Do Not Operate Using Front/Rear Auxiliary Controls
- Test R: Panel/Floor & Cool/Warm Controls Do Not Operate Using Front/Rear Auxiliary Controls
- Test S: Panel/Floor & Cool/Warm Controls Do Not Operate/Do Not Operate Correctly Using Rear Auxiliary Controls
- Testing
- Removal & Installation
- Notes
- Condenser
- Accumulator-Drier
- Compressor
- Control Panel
- Evaporator Unit
- Fixed Orifice Tube
- Main Heater Unit
- Main Blower Motor Assembly
- Main Blower Motor Resistor
- Auxiliary A/C-Heater Unit
- Auxiliary Blower Motor Assembly
- Auxiliary Heater & Evaporator Cores
- Thermostatic Expansion Valve
- Instrument Panel
- Blend Door Actuator
- Vacuum Control Motors
- Torque Specifications
- Vacuum Hose Diagram(S)
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.