HVAC

All Description and Operation

• Heater System Description

Diagnostic Procedures

• Air Conditioning (A/C) Condenser Fan System Check
• Auxiliary Heater Diagnostic Starting Point
• Auxiliary Heater Inoperative
• Auxiliary Heater Relay Test
• Auxiliary Heater Runs Continuously
• Coolant Pump System Check
• Cooling Insufficient - Air Conditioning (A/C) System
• Heat Switch Inoperative
• Heating Insufficient
• High Voltage Disabling
• High Voltage Enabling
• HVAC Air Delivery System Check
• HVAC Compressor Controls System Check
• HVAC Compressor Motor Electrical Test
• HVAC Compressor Motor Insulation Test
• HVAC System Check
• Power Brake Booster Vacuum Pump Inoperative
• Power Brake Booster Vacuum Pump Runs Continuously
• Symptoms