HVAC

Topic area	Topic group	Topic

Heating & Air-conditioning	HVAC basic principles	HVAC legislation; Vehicle heating & ventilation systems; Basic air-conditioning principles; Air-conditioning capacity; Air-conditioning refrigerant; Humidity
	Fixed orifice tube air-conditioning system	Fixed orifice; Control devices
	Thermal expansion valve air-conditioning system	Thermostatic expansion valve system; Thermal expansion valves
	Air-conditioning components	Air-conditioning compressors; Condensers & evaporators; Receiver drier; Lines & hoses; TX valve construction; Temperature monitoring thermostat; Refrigerants; Pressure switches; Heating elements
	Climate control	Air-conditioning ECU; Ambient air temperature sensor; Servo motors; Electric servo motors; Automatic climate control sensors; Evaporator temperature sensor; Blower speed control; Ventilation systems
	HVAC procedures	Checking an A/C system; Checking a heating system; Inspecting & adjusting an engine drive belt; Replacing an engine drive belt