This course covers the theory of refrigeration and heating, electrical/electronic/pneumatic controls, and diagnosis and repair of climate control systems. Topics include diagnosis and repair of climate control components and systems, recovery/recycling of refrigerants, and safety and environmental regulations. Upon completion, students should be able to diagnose and repair vehicle climate control systems.

Prerequisites: ENG 002, TRN 110, TRN 120.

Corequisites: TRN 140A

Class Hours: 1        Lab Hours: 2        Clinical/Work Exp.: 0        Credit Hours: 2


  • In a lab setting, demonstrate work place safety per OSHA and EPA guidelines that apply to relevant climate control systems found on transportation vehicles and equipment. (CCL)

  • Given a transportation vehicle or related equipment with a fault to the climate control system, diagnose and repair the climate control system using the recommended lab equipment as outlined by the related service information. (CCL)

  • Using the recommended equipment as outlined by the EPA, identify and perform the proper recovery and recycling procedures for any refrigerant in a transportation vehicle or related equipment. (CCL)

  • Describe the operation of the heating, ventilation and air condition systems. (CCL)

  • Describe the use of climate control testing equipment to aid diagnosis of the systems. (CCL)

  • Describe the use of appropriate service information and capacity charts. (CCL)

  • Describe the EPA regulations that govern the proper use of refrigerants in a transportation vehicle or related equipment. (CCL)

General: A/C System Diagnosis and Repair

  • Identify and interpret heating and air conditioning problems; determine needed action.

  • Research vehicle service information including refrigerant/oil type, vehicle service history, service precautions, and technical service bulletins.

  • Performance test A/C system; identify problems.

  • Identify abnormal operating noises in the A/C system; determine needed action.

  • Identify refrigerant type; select and connect proper gauge set/test equipment; record temperature and pressure readings.

  • Leak test A/C system; determine needed action.

  • Inspect condition of refrigerant oil removed from A/C system; determine needed action.

  • Determine recommended oil and oil capacity for system application.

  • Using a scan tool, observe and record related HVAC data and trouble codes.

Refrigeration System Component Diagnosis and Repair

  • Inspect, remove, and/or replace A/C compressor drive belts, pulleys, tensioners and visually inspect A/C components for signs of leaks; determine needed action.

  • Inspect, test, service and/or replace A/C compressor clutch components and/or assembly; check compressor clutch air gap; adjust as needed.

  • Remove, inspect, reinstall, and/or replace A/C compressor and mountings; determine recommended oil type and quantity.

  • Identify hybrid vehicle A/C system electrical circuits and service/safety precautions.

  • Determine need for an additional A/C system filter; perform needed action.

  • Remove and inspect A/C system mufflers, hoses, lines, fittings, O-rings, seals, and service valves; perform needed action.

  • Inspect for proper A/C condenser airflow; determine needed action.

  • Remove, inspect, and replace receiver/drier or accumulator/drier; determine recommended oil type and quantity.

  • Remove, inspect, and install expansion valve or orifice (expansion) tube.

  • Inspect evaporator housing water drain; perform needed action.

  • Diagnose A/C system conditions that cause the protection devices (pressure, thermal, and/or control module) to interrupt system operation; determine needed action.

  • Determine procedure to remove and reinstall evaporator; determine required oil type and quantity.

  • Remove, inspect, reinstall, and/or replace condenser; determine required oil type and quantity.

Heating, Ventilation, and Engine Cooling Systems Diagnosis and Repair

  • Inspect engine cooling and heater systems hoses and pipes; perform needed action.

  • Inspect and test heater control valve(s); perform needed action.

  • Diagnose temperature control problems in the HVAC system; determine needed action.

  • Determine procedure to remove, inspect, reinstall, and/or replace heater core.

Operating Systems and Related Controls Diagnosis and Repair

  • Inspect and test HVAC system blower motors, resistors, switches, relays, wiring, and protection devices; determine needed action.

  • Diagnose A/C compressor clutch control systems; determine needed action.

  • Diagnose malfunctions in the vacuum, mechanical, and electrical components and controls of the heating, ventilation, and A/C (HVAC) system; determine needed action.

  • Inspect and test HVAC system control panel assembly; determine needed action.

  • Inspect and test HVAC system control cables, motors, and linkages; perform needed action.

  • Inspect HVAC system ducts, doors, hoses, cabin filters, and outlets; perform needed action.

  • Identify the source of HVAC system odors.

  • Check operation of automatic or semi-automatic HVAC control systems; determine needed action.

Refrigerant Recovery, Recycling, and Handling

  • Perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards.

  • Identify A/C system refrigerant; test for sealants; recover, evacuate, and charge A/C system; add refrigerant oil as required.

  • Recycle, label, and store refrigerant.


A Excellent 4 Grade Points Numerical grade of 90 - 100
B Above Average 3 Grade Points Numerical grade of 80 - 89
C Average 2 Grade Points Numerical grade of 70 - 79
D Below Average 1 Grade Point Numerical grade of 60 - 69
F Failed 0 Grade Point Numerical below 60
WP Withdraw Passing 0 Grade Point Issued if the course is dropped after the
census date and on or before the 60% point
of the course unless the instructor issues
a WF based on extenuating circumstances
WF Withdraw Failing 0 Grade Point Issued if the course is dropped after the
60% point of the course or the instructor
chooses based on extenuating circumstances


Regular, prompt attendance is essential for academic success. Students should strive for perfect attendance. It is recognized, however, that students may be absent from class occasionally. Students should reference the instructor's syllabus to determine the attendance requirement for this course. The instructor is responsible for enforcing the attendance requirement. It is the student's responsibility to withdraw from the course. Students may complete the withdrawal process in the Advising Center. Students may receive a grade of WP if they withdraw from a course by the 60% point/date of the course. Any student withdrawals that occur after the 60% point will result in a grade of WF. Exceptions to the "WF" grade may exist if the student has a mitigating circumstance. Students are encouraged to discuss withdrawal options with the faculty member and complete the withdrawal process in the Advising Center. Students who come in after the scheduled starting time or students who leave before the scheduled ending time will be counted as tardy. Students should reference the instructor's syllabus to determine the tardy requirement for this course. The instructor is responsible for enforcing the tardy requirement.


To preserve the best learning environment for all students, all cell phones and other electronic devices must be turned off and stored with other personal property in book bags while class is in session. Ear buds must be removed. If a student uses these devices during class, the instructor will require the student to leave because text messaging and other activities disturb the class and prevent others from concentrating on class work. If a student uses electronic devices during a test or quiz, a zero will be recorded for that assignment, and the instructor may withdraw the student from the course. The use of a phone in any way during a test or the discussion of a graded test is strictly prohibited and considered cheating.


If you have a documented disability and wish to discuss academic accommodations, please contact Frank Pait, Counselor for Students with Disabilities, at extension 4222, in the Learning Assistance Center (LAC) located on the first floor of the Cuyler A. Dunbar Building (CAD).

If you are a student with a mobility impairment and have a class in a multi-story building, please discuss evacuation plans with your instructor.


Students shall be permitted excused absences from all classes two days per academic year for religious observances required by their faith. The absences requested in accordance with this policy are "one of" and not "in addition to" any absences otherwise permitted by the faculty for a class. The excused absence request must be submitted by the second class meeting and a minimum of two (2) weeks in advance of the absence. Please contact your instructor for the required forms.


Students at CVCC are expected to be honest in all academic pursuits, whether class, lab, shop, or clinical. Acts of academic dishonesty are considered unethical and subject to behavior sanctions. Examples of academic dishonesty include, but are not limited to the following:

1. Sharing information about the content of quizzes, exams, classroom/lab/shop/clinical assignments (scheduled or make-up) without approval of the instructor including but not limited to unauthorized copying, collaboration, or use of notes, books, or other materials when preparing for or completing examinations or other academic assignments (scheduled or make-up).

2. Buying, selling, or otherwise obtaining a copy of a quiz, exams, project, term paper, or like document, without approval of the instructor.

3. Plagiarism, which is defined as the intentional representation of another person's work, words, thoughts, or ideas (from any source) as one's own.

4. Failing to follow approved test taking procedures by performing such acts as:
  • Looking on another student's test
  • Use of unauthorized notes; written, electronic, or otherwise
  • Changing answers after exam is scored
  • Verbal, non-verbal, or electronic communication with another student during an exam

Instructors have the authority to impose either a warning, probation, or dismissal from the class for acts of academic dishonesty relative to classes under their supervision.

Students have an obligation to report any acts of academic dishonesty to the instructor or appropriate campus authority when reasonable grounds exist for such a report. Students also have a responsibility to cooperate in the investigation of any alleged acts of academic dishonesty. Failure to report acts of academic dishonesty could result in a behavior sanction as outlined in the Student Conduct Policy, Policy 3.18


Reporting and Response to Sexual Violence, Sexual or Gender-based Harassment, and Other Sexual Misconduct

"Title IX Violations" is the term that will be used to include "sexual violence, sexual or gender-based harassment, and other sexual misconduct" and is explained further in Procedure 3.18.2. The Procedure can be found on the CVCC Website under About Us/Procedures.

Procedure 3.18.2 applies exclusively to Title IX Violations allegations. All other forms of harassment and/or discrimination are handled under Policy 3.18: Student Code of Conduct.

Students and/or employees are encouraged to report Title IX Violations in any of its forms, including, but not limited to, sexual or gender-based harassment, rape, sexual assault, other forcible and non-forcible sex offenses, domestic or dating violence, or stalking, and CVCC supports this procedure for students and employees in compliance with Title IX legislation.

Any student who believes that he or she is being, or has been subjected to, Title IX Violations is encouraged to file a report of the alleged Title IX Violations promptly with the Title IX Coordinator, Dean for the School of Access, Development, and Success.


To Report a Serious Emergency Dial 911 from any campus phone or 911 from mobile phones; then dial 711 (Campus Safety & Security) from a campus phone.

For specific CVCC emergencies guidelines, please refer to the CVCC Emergency Guidebook


Quickly get all persons behind a locked door, close blinds, lock all windows/doors, and turn off lights. Sit against an interior wall away from windows and doors (hide). Keep cell phones ON in silent mode or vibrate. Do not leave the locked area until notified by a known CVCC administrator or by law enforcement that the emergency is over.

Seek Shelter (tornados, hurricanes, etc.)
Move to hallways and/or other inner rooms. Stay away from windows and doors. Sit on floor facing the inner wall and shield head with hands. Remain in shelter until notified by CVCC administration or by emergency personnel that the danger is over.

Building Evacuation
Leave the building immediately and proceed to a parking lot location at least 300 feet from the building. Do not delay to retrieve books or other personal items. Do not use elevators. Do not touch suspicious objects. Stay clear of the building once outside. Faculty should take class rosters if possible and account for all students at evacuation locations. Report any special assistance needed to CVCC faculty/staff or to emergency personnel. If you are aware or suspect someone is trapped in a threatened building, notify CVCC faculty/staff or emergency personnel. Remain at your building evacuation location until further instructions are provided by CVCC administration or by emergency personnel. In case of bomb threat, avoid using cell phones and wireless devices; this may detonate the bomb.

Smoke, Fire or Hazardous Materials
Activate the nearest fire alarm. Before attempting to fight a fire, notify someone nearby. Never attempt to fight a fire larger than wastebasket size. Close doors and windows to isolate the problem if the situation permits. If trapped in a building during a fire, use wet towels or cloths to protect you from flames and smoke. Stop/drop/roll if your clothes catch on fire. Do not open doors that feel hot. Always stay between the fire and an exit. Stay low to the floor as you try to exit.

Personal Emergencies
Unless you feel threatened, stay with the victim until emergency personnel arrive. Avoid contact with bodily fluids. Stay calm and try to minimize panic. If the person is conscious, ask if he/she is a High School student (if so, include this information in your 911 call).

Emergency Procedures Revised: April 4, 2012

Cell phone backup to 711 Campus Safety & Security:

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