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AUTOMOTIVE HEATING &
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DI05002021
Code: DI05002021
Credits: 4
Semester 5
COMPUTER
Automotive Heating & Air Conditioning
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Follow on Instagram for UpdatesAutomotive Heating & Air Conditioning Syllabus — Unit-wise Content
The official GTU curriculum for Automotive Heating & Air Conditioning (subject code DI05002021) as prescribed for COMPUTER · Semester 5 divides the course into 5 units, covering 64 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (DI05002021)Unit 1 Fundamental of Air conditioning System.
- 1.1. Requirement and use of Air conditioning system in Automotive Vehicles.
- 1.2. Air conditioning system basic terminology.
- 1.2.1. Modes of heat transfer
- 1.2.2. Refrigeration, Air Conditioning
- 1.2.3. Cooling Load, Cooling Capacity, 1 Ton of refrigerant
- 1.2.4. Humidity (Absolute & Relative), Dry bulb Temperature, Wet Bulb Temperature and Dew point temperature.
- 1.2.5. Dry Air, Moist air, saturated air and unsaturated air.
- 1.2.6. Sensible heat, Latent heat Evaporation Latent Heat of Condensation
- 1.3. Types and properties of Refrigerant and Refrigerant Oil.
- 1.4. Effect of air conditioning refrigerants on the environment.
- 1.5. Concept of ecofriendly refrigerants.
Unit 2 Automotive Cooling System.
- 2.1. Basic working cycle of Automotive cooling system (Vapour Compression Refrigeration cycle)
- 2.2. Major components Automotive cooling system
- 2.2.1. Magnetic clutch.
- 2.2.2. Types of compressors.
- 2.2.4. Receiver Drier and Filter.
- 2.2.6. Expansion valves and heat sensing tube, Orifice tube.
- 2.3. Trouble shooting of automotive cooling system.
- 10. 21% GUJARAT TECHNOLOGICAL UNIVERSITY Program Name: Diploma Engineering Level: Diploma Branch: Automobile Engineering Subject Code: DI05002021 Subject Name: Automotive Heating & Air Conditioning w.e.f. 2026-27 http://syllabus.gtu.ac.in/ Page no. 3 of 8
- 2.3.1. Based on complain
- 2.3.2. Based on component defect.
- 2.4. Various Contaminant and their effects.
Unit 3 Automotive Heating & HVAC Ventilation System.
- 3.1. Various Automotive Heating Methods
- 3.2. Major components Automotive heating system.
- 3.2.1. Engine Radiator
- 3.2.2. Heater Core
- 3.2.3. Heater Hoses
- 3.2.4. Heater Control Valve
- 3.2.5. HVAC Control Panel
- 3.3. Working of electric heating system.
- 3.4. Ventilation of Automotive AC System.
- 3.4.1. Air Distribution system.
- 3.4.2. Duct System.
- 3.4.3. Different Outlets and Grills/vents
- 3.4.5. Air Filters
- 3.5. Types of Air Conditioning Unit Based on its working 1) Heater Cooler Independent System 2) Reheat Air Conditioning System 3) Semi-air mixed type Air Conditioning System 4) .Full air mixed type Air Conditioning System Based on its location. 1) Dash type air condition system 2) Boot type air conditioning system 3) Dual air conditioning system
- 3.6. Trouble shooting of Automotive Heating System.
- 3.7. Trouble shooting of Air Distribution Unit
Unit 4 Various controls and Automatic climate control.
- 4.1. Controls of Automotive AC system
- 4.1.1. Pressure Switch
- 4.1.2. Evaporator Pressure Regulator
- 4.1.3. Humidifier and Dehumidifier
- 4.1.4. Thermistor Switch
- 4.1.5. Vacuum operated device
- 4.2. Semi-Automatic Temperature Control (SATC) and its Input Sensors.
- 10. 21% GUJARAT TECHNOLOGICAL UNIVERSITY Program Name: Diploma Engineering Level: Diploma Branch: Automobile Engineering Subject Code: DI05002021 Subject Name: Automotive Heating & Air Conditioning w.e.f. 2026-27 http://syllabus.gtu.ac.in/ Page no. 4 of 8
- 4.3. Automatic Temperature Control (ATC) and its Input Sensors.
- 4.4. Automatic climate control.
- 4.5. Safety while working with Automotive AC system.
Unit 5 HVAC Maintenance, Servicing and Repairing.
- 5.1. Inspection of A.C system –Visually and with the help of sight glass.
- 5.2. leak test of refrigerant
- 5.1.1. Electronic leak detector unit
- 5.1.2. Soap Bubble method
- 5.1.3. Water Immersion method
- 5.1.4. Fluorescent dye and Ultra violate rays method
- 5.3. Periodic service (Routine Service) of Automotive AC System.
- 5.4. Automotive charging and discharging methods:
- 5.4.1. Discharging A.C system and Evacuating A.C system.
- 5.4.2. Charging A.C system using various methods. (Liquid Charging, Vapour charging, top up cane charging, Charging with recovery unit)
- 5.4.3. Adding oil in Automotive A.C system.
- 5.5. Servicing steps/procedure of following components:
- 5.5.1. Compressor and Magnetic clutch and shaft seal replacement
- 5.5.2. Hose pipe fitting and connection checking.
- 5.5.3. Evaporator, condenser, Heater core.
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