Refrigeration Technology, Domestic/Commercial

Refrigeration and ventilation systems are growing more efficient and more complicated every year. Installing, fixing and maintaining these systems requires specialized, up-to-date knowledge and experience. This program prepares graduates to work as domestic or commercial service technicians on refrigeration, air conditioning and heat pump systems. Students work in the classroom and on real appliances to get a thorough understanding of electrical and refrigeration theory. They will learn to service, repair, and troubleshoot equipment, and how to safely handle, store, and dispose of refrigerants. They will also gain experience in the brazing and soldering of copper, steel, and aluminum. This program meets Washington State Department of Labor and Industries, Electrical Section standards.

Enrollment Point: Fall, Spring

Certificate of Completion: 
4 Quarters
80 Credits
Associate of Applied Science: 
6 Quarters
100 Credits
AAS - Transfer: 
Bachelor of Applied Science: 

All program lengths are estimates and are not guarantees. For the most current program information, check with an adviser by calling (425) 235-5840.

Median Salary: 
Projected Growth: 
Annual Job Openings: 

These amounts are based on median entry level wages, they are estimates and are not guarantees. For more information, visit


At Renton Technical College, tuition is affordable and competitive.

Financial Aid

Federal aid is available for most students to help pay for school. Fill out your FAFSA now to get started.


The RTC Foundation offers scholarships to help pay the costs of attending school.

All costs are estimates and are not guarantees. For the most current program information, check with an adviser by calling (425) 235-5840.

Monday - Friday

7:30 a.m. to 2 p.m.

Hours may vary based on specific program requirements. For the most current program information, check with an adviser by calling (425) 235-5840.

John Campbell

Entry Requirements

Admission Requirements

Minimum age: 18 years.
Must take the Accuplacer test.
Physical strength and physical ability to perform job functions as described below:

  • Arm-Hand Steadiness - The ability to keep you hand and arm steady while moving your arm or while holding your arm and hand in one position.
  • Finger Dexterity - The ability to make precisely coordinated movements of the fingers of one or both hands to grasp, manipulate, or assemble very small objects.
  • Manual Dexterity - The ability to quickly move your hand, your hand together with your arm, or your two hands to grasp, manipulate, or assemble objects.
  • Near Vision - The ability to see details at close range (within a few feet of the observer).
  • Control Precision - The ability to quickly and repeatedly adjust in controls of a machine or a vehicle to exact positions.
  • Extent Flexibility - The ability to bend, stretch, twist, or reach with your body, arms, and/or legs.
  • Multi-limb Coordination - The ability to coordinate two or more limbs (for example, two arms, two legs, or one leg and one arm) while sitting, standing, or lying down. It does not involve performing the activities while the whole body is in motion.
  • Trunk Strength - The ability to use your abdominal and lower back muscles to support part of the body repeatedly or continuously over time without 'giving out' or fatiguing.
  • Lifting - The ability to lift 50 lbs. 

Admission Recommendations

  • Mechanical aptitude which is defined as follows:

    • Problem Sensitivity - The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem.
    • Deductive Reasoning - The ability to apply general rules to specific problems to produce answers that make sense.
    • Inductive Reasoning - The ability to combine pieces of information to form general rules or conclusions (includes finding a relationship among seemingly unrelated events). 
  • Counselor and instructor interview Valid Washington State driver's license
  • Insurable (good driving record) to employer requirements
  • Criminal background check should be clear for the time specified by employer’s application
  • Ability to pass entry and periodic drug testing as required by employers

Course Information

Refrigeration Technology - Domestic/Commercial Core Courses

Course # Course Title Crs
COL 101 College Success 2
JSTI 101 Core Construction Skills 5
JSTI 109 Safety, Tool and Equipment Certification 4
JSTI 111 Structural Trades 2
JSTI 117 Electrical and Mechanical Trades 2
JSTI 126 Sustainable Building Trades 1
JSTI 168 Trades Math I 3
JSTI 175 Communication for Trades 2
JSTI 180 Human Relations for Trades 2
MART 111 Industrial Direct Current (D-C) 4
MART 112 Industrial Alternating Current (A-C) 4
MART 120 Industrial Solid State Electronics - Basics 3
MART 123 Diagnostic Techniques & Test Equipment 5
MART 125 Electric Motors 6
MART 226 Principles of Thermodynamics 6
MART 228 EPA Regulations and Refrigerant Recovery 3
MART 230 Brazing Principles and Techniques 4
MART 232 Refrigeration Evacuation and Charging 2
AMATH 175S Industrial Math for Thermodynamics 2


Refrigeration Technology - Domestic Certificate Requirements (in addition to Core courses listed above)

Course # Course Title Crs
MART 234A Domestic Refrigeration Servicing 6
MART 234B Domestic Refrigeration Servicing (Built In) 6
MART 235 Window Air and Wall AC/HP Servicing 4
MART 243 Icemaker Equipment 2
  Total 80

Refrigeration Technology - Commercial Certificate Requirements (in addition to Core courses listed above)

Course # Course Title Crs
MART 236A Light Commercial Refrigerator Service I 4
MART 236B Light Commercial Refrigerator Service II 2
MART 238 HVAC and Controls 6
MART 245 Commercial Ice Machines 6
  Total 80

General Education Course Requirements for AAS Degree (for both Domestic and Commercial options)

Course # Course Title Crs
AMATH 175 Applied Mathematics for Business and Industry or 5
AMATH 185 Applied Algebra for Business and Industry  
CMST& 101 Intro to Communications 5
COMP 100 Applied Composition or 5
ENGL& 101 English Composition  
PSYC& 100 General Psychology 5
  Total 20

Program Outcomes

Program Outcomes for Major Appliance and Refrigeration Technology programs:

  • Practice industry safety standards for the installation and operation of all major appliance products
  • Select and properly use appropriate instruments, tools, and equipment
  • Utilize technology to access service and parts information
  • Demonstrate leadership, motivation, and problem solving skills in diverse and complex work situations
  • Communicate effectively in writing and verbally with customers, co-workers and supervisors
  • Diagnose and repair malfunctions on major appliance, home, residential and commercial refrigeration products


External accreditation is not applicable to this program.


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