Section 678 (HVAC Control System - General Information - Excursion & F250-F550 Super Duty)
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Climate Control System
- Notes
- Principles of Operation
- Heat Transfer
- Latent Heat of Vaporization
- Relative Humidity
- Effects of Pressure on Boiling or Condensation
- Compressor Anti-Slugging Strategy
- The Refrigerant Cycle
- Clutch Cycling Orifice Tube Type Refrigerant System
- System Airflow Description - Manual Climate Control
- System Airflow Description - EATC
- Climate Control System
- Diagnosis And Testing
- Climate Control System
- Notes
- Special Tool(s)
- Vacuum Schematic-Manual A/C
- Function Selector Switch Vacuum Connector End View
- Vacuum Application Chart - Manual A/C
- Vacuum Schematic-EATC
- ATC Solenoid and Manifold Vacuum Connector End View
- Vacuum Application Chart - EATC
- Inspection and Verification
- Electronic Automatic Temperature Control Module - Diagnostic Methods
- Electronic Automatic Temperature Control Module Self-Test
- Electronic Automatic Temperature Control Module - Retrieve Continuous DTCs
- Diagnostic Trouble Code Index
- Electronic Automatic Temperature Control (EATC) Module Diagnostic Trouble Code (DTC) Index
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: DTC B2266 - Blend Door Failure Or Short
- Pinpoint Test B: DTC B1251 Or DTC1253 - A/C In-Car Temperature Sensor Open Circuit Or Short To Ground
- Pinpoint Test C: DTC B1255 Or DTC B1257 - A/C Ambient Temperature Sensor Open Circuit Or Short To Ground
- Pinpoint Test D: DTC B1259 Or DTC B1261 - Solar Radiation Sensor Open Circuit Or Short To Ground
- Pinpoint Test E: No Communication With The Electronic Automatic Temperature Control Module
- Pinpoint Test F: The EATC System Is Inoperative, Intermittent Or Incorrect Operation
- PINPOINT TEST G: INCORRECT/ERRATIC DIRECTION OF AIR FLOW FROM OUTLET(s) - MANUAL CLIMATE CONTROL
- PINPOINT TEST H: INCORRECT/ERRATIC DIRECTION OF AIR FLOW FROM OUTLET(s) - EATC
- Pinpoint Test I: Insufficient, Erratic Or No Heat
- Pinpoint Test J: The A/C Does Not Operate/Does Not Operate Correctly
- Pinpoint Test K: The A/C Is Always On
- Pinpoint Test L: Temperature Control Is Inoperative/Does Not Operate Correctly - Manual Climate Control
- Pinpoint Test M: The Blower Motor Is Inoperative - Manual Climate Control
- Pinpoint Test N: The Blower Motor Is Inoperative - EATC
- Pinpoint Test O: The Blower Motor Operates Continuously In High Speed - Manual Climate Control
- Pinpoint Test P: No Operation In High Blower Setting - Manual Climate Control
- Pinpoint Test Q: No Operation In Lower Speeds - Manual Climate Control
- Pinpoint Test R: The Blower Motor Does Not Operate Correctly - EATC
- Pinpoint Test S: The Steering Wheel Control Switch Is Inoperative/Does Not Operate Correctly
- Pinpoint Test T: The Auxiliary Blower Motor Does Not Operate
- Pinpoint Test U: The Auxiliary Blower Motor Does Not Operate Correctly
- Pinpoint Test V: The Panel/Floor Control Does Not Operate Using The Front/Rear Auxiliary Climate Controls
- Pinpoint Test W: The Temperature Control Does Not Operate Using The Front/Rear Auxiliary Climate Controls
- Pinpoint Test X: The Panel/Floor And Cool/Warm Controls Do Not Operate On The Front/Rear Auxiliary Controls
- Pinpoint Test Y: The Front/Rear Auxiliary Blower Motor Switch Operates Only In Hi
- Pinpoint Test Z: The Front/Rear Auxiliary Blower Motor Switch Does Not Operate In Hi
- Component Tests
- Climate Control System
- General Procedures
- Air Conditioning (A/C) System Check - Retail Procedure
- Spring Lock Coupling
- Air Conditioning Line (Peanut) Fitting
- Heater Hose Coupling
- Refrigerant System Tests
- Air Conditioning (A/C) Clutch Air Gap Adjustment
- Electronic Leak Detection
- Fluorescent Dye Leak Detection
- Air Conditioning (A/C) System Flushing
- Air Conditioning (A/C) System Recovery, Evacuation and Charging
- Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
- Refrigerant Oil Adding
- Refrigerant Identification Testing
- Vacuum Hose Repair - Mini-Tube
- Air Conditioning (A/C) Odor Treatment