A7: Heating, Ventilation, A/C (HVAC) and Engine Cooling System Service, Diagnosis and Repair A/C Does not Blow Cold A/C Performance Test A/C Proper Charge Level A/C System Operation Active Grill Shutters Conduction Convection Coolant Test Does Compressor Engage Heat Transfer Heat Transfer & Boiling Heat Transfer Through Latent Heat HVAC System Identify Refrigerant, Economy Identify Refrigerant, Professional Leak Detector Maintenance Pressure Checks, Excess Pressure Pressure Checks, Low Pressure Radiant Heat Refrigerant Leak Detector Refrigerant Leak Detector Operation
