Thermostatic Air Cleaners -- All Models

• Description
• Operation
  • Notes
  • Vacuum Check/Delay Valve
  • Vacuum Trap (General Motors Vehicles Only)
  • Cold Weather Modulator (Ford Motor Co. Only)
• Testing
  • Notes
  • Vacuum Control Temperature Sensor Test
    • American Motors Models
    • All Other Models
  • Vacuum Motor Test
  • Vacuum Motor Trap Door Test (AMERICAN Motors 4.2L (258") 6-CYL. Only)
  • Cold Weather Modulator (Ford Motor Co. Only)