ASE 7: HEATING, VENTILATION, AND AIR CONDITIONING (HVAC)

General
MAST7002 Research vehicle service information, including refrigerant/oil/fluid type, vehicle service history, service precautions, technical service bulletins, and recalls including vehicles equipped with advanced driver assistance systems (ADAS).
MAST7038 Identify heating, ventilation, and air conditioning (HVAC) components and configurations.
MAST7039 Retrieve and record DTCs, OBD monitor status, and freeze frame data; clear codes and data when directed.
MAST7003 Perform A/C system performance test
MAST7004 Identify abnormal operating noises in the A/C system
MAST7006 Leak test A/C system
MAST7001 Identify and interpret heating and air conditioning problems
MAST7005 Identify refrigerant type
MAST7007 Inspect condition/quantity of refrigerant oil removed from A/C system
MAST7008 Determine recommended oil and oil capacity for system application and component(s) replacement.
Refrigeration System Components
MAST7010 Inspect, remove, and/or replace A/C compressor drive belts, pulleys, tensioners; determine needed action.
MAST7016 Inspect for proper A/C condenser airflow
MAST7019 Inspect evaporator housing condensation drain
MAST7011 Inspect, test, and/or service A/C compressor clutch components and/or assembly; determine needed action.
MAST7012 Remove, inspect, reinstall, and/or replace A/C compressor and mountings; determine recommended oil type and quantity.
MAST7015 Remove and inspect A/C system mufflers, hoses, lines, fittings, O-rings, seals, and service valves; determine needed action.
MAST7017 Remove, inspect, and replace receiver/drier or accumulator/drier; determine recommended oil type and quantity.
MAST7018 Remove, inspect, and install expansion valve or orifice (expansion) tube.
MAST7020 Diagnose A/C system conditions that cause the protection devices (pressure, thermal, and/or control module) to interrupt system operation; determine needed action.
MAST7021 Determine procedure to remove and reinstall evaporator
MAST7022 Remove, inspect, reinstall, and/or replace condenser; determine required oil type and quantity.
Heating, Ventilation, and Engine Cooling Systems
MAST7023 Inspect engine cooling and heater systems hoses and pipes
MAST7024 Inspect and test heater control valve(s)
MAST7025 Diagnose temperature control problems in the HVAC system related to the engine cooling system, including electric heating; determine needed action.
MAST7026 Determine procedure to remove, inspect, reinstall, and/or replace heater core; properly refill system.
Operating Systems and Related Controls
MAST7032 Inspect HVAC system ducts, doors, hoses, cabin filters, and outlets; determine needed action.
MAST7033 Identify the source of HVAC system odors.
MAST7027 Inspect and test HVAC system blower motors, resistors, switches, relays, wiring, and protection devices; determine needed action.
MAST7028 Diagnose air-conditioning (A/C) compressor control systems
MAST7029 Diagnose malfunctions in the vacuum, mechanical, and/or electrical components and controls of the HVAC system; determine needed action.
MAST7030 Inspect, test, remove and/or replace HVAC system control panel; determine needed action.
MAST7034 Check operation of automatic HVAC control systems
Refrigerant Recovery, Recycling, and Handling
MAST7040 Demonstrate awareness of the need to recover, recycle, and handle refrigerants using proper equipment and procedures.
MAST7035 Use and maintain refrigerant handling equipment according to equipment manufacturer's standards.
MAST7036 Identify A/C system refrigerant; test for sealants; recover, evacuate, and charge A/C system; add refrigerant oil as required.
MAST7037 Recycle, label, and store refrigerant.