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This certificate prepares students to fill careers as service technicians in the field of heating and air conditioning. All courses apply toward the A.O.S degree in Air Conditioning Technology - Refrigeration Option.

Goal 1. To prepare the students to be safe and competent HVAC&R technicians.

  • Student will follow safety procedures.
  • Students will demonstrate ability to troubleshoot oil and gas heating systems and develop a corrective action plan.
  • Students will demonstrate ability to troubleshoot split air conditioning systems and develop a corrective action plan.
  • Students will demonstrate ability to troubleshoot commercial refrigeration systems and develop a corrective action plan.

Goal 2. To prepare students to communicate effectively.

  • Students will construct and confidently deliver clear written and oral laboratory experiment reports Goal 3 Prepare students to apply basic mathematical, scientific and technical concepts to the solution pressure temperature relationship.

Goal 3. To provide students the ability to apply basic technical concepts to the solution of HVAC&R electrical systems.

  • Students will be able to employ measurement techniques and laboratory apparatus for verification of refrigeration, heating, and air conditioning electrical circuit operation.

Goal 4. To prepare students to interact effectively in a diverse society.

  • Students will collaborate in laboratory activities to complete assigned projects..
  • The student will demonstrate openness toward diverse points of view, and draw upon knowledge and experiences of others to function as a team member.
  • The graduate will complete the DGV requirement.

Goal 5. To prepare students to demonstrate information literacy.

  • Students will use traditional and contemporary information technology.
  • Students will identify, access, and appropriately use authoritative sources of information.

Gainful Employment - follow the link below for gainful employment information.


Total Credit Hours: 34

First Semester

This course covers the four fundamental operations on integers, rational numbers, and real numbers. It includes the study of weights and measures, exponents and radicals, factoring, and linear equations, with an emphasis on technical applications.

This course covers basic physics as applied to refrigeration and air conditioning. Topics include flaring and soldering techniques, compressor construction, domestic refrigeration, and characteristics of automatic controls.

This introductory course provides the basic knowledge and skills necessary within any electrical service technician program. It includes an in-depth study of electron theory, Ohm’s Law, series and parallel circuits, as well as electrical energy and power relationships. Also included are methods of generation of electromotive force, electromagnetism, and motor principles and capacitance as these apply to DC circuits. Uses, construction, and calibration of voltmeters and ammeters are investigated. Corequisite: MA105 Technical Mathematics 1.

This course introduces combustion techniques in oil and gas furnaces. It covers coil cells, stack controls, oil primary controls plus safety devices. Basic principles are applied to problem-solving in heat transfer. Types of systems involving residential and small commercial heating and air conditioning are covered. Split systems, hydronic systems, electric heat, heating and air conditioning controls, and package equipment are discussed along with heat pumps. Corequisites: ET108 Refrigeration 1.

Second Semester

This course is a continuation of ET101 Technical Electricity 1. It reinforces previously acquired information and applies it to alternating current (AC) circuits. It investigates AC sine wave generation, mutual inductance inductive and capacitive reactance, and instantaneous values of voltage and current as well as real and apparent power. Uses, construction, and calibration of AC metering equipment are an integral part of this course. Practical application of each topic in both introductory courses are included in all laboratory experiments. Prerequisite: ET101 Technical Electricity 1.

This course covers the types, application, and use of electrical/electronic drawings. It includes schematic diagrams and symbols as well as the operation of electro-mechanical devices. The course differentiates between schematics and wiring diagrams. It develops the use of block diagrams, schematics, ladder-logic diagrams, wiring diagrams, assembly drawings, and bills of material. Topics include Programmable Logic Controllers (PLCs), Basic Relay PLC Instructions, PLC Timers and Counters, and PLC programs in the form of PLC ladder diagrams. Corequisite: ET102 Technical Electricity 2.

This course covers the components of refrigeration for commercial and industrial systems. It includes systems requirements and the application of components to develop built-up systems. Prerequisite: ET108 Refrigeration 1. (Fall semester)

This course covers calculations of heat loss and gain based on residential and commercial levels. Topics include humidification; dehumidification; air mixture problems; and determination of U factors to enhance calculation accuracy. Additional topics include ventilation, exhaust loads and standards, and a working background in psychometrics. The course starts with simple heat properties of air and will progress to complex air mixture properties.

This course covers the impact of refrigerant on the global environment. Topics include ozone destruction, climate change, and EPA standards for the safe usage and handling of refrigerants. Additional topics include the Montreal Protocol and Clean Air Act of 1990.