This “Hands-on” workshop is designed specifically for Facility Maintenance personnel. Its focus is on trouble-shooting common problems that occur in refrigerators, which prevent them from cooling properly and, therefore, costing more money to operate.

The fundamentals of a Refrigerator Operating System will be covered early in the workshop so that participants can learn and understand how to differentiate between a rare refrigeration system problem, and the more common problems related to electrical components and air flow.  A complete study of wiring schematics and the specifics related to refrigerator electrical components will be explained prior to the “hands-on” procedures. During the “hands-on” portion of the workshop, participants will use meters to test components and to test for specific problems such as: Running but not cooling; Compressors not starting; Units that are not running at all.  During the workshop, different types of refrigerators will be covered along with safety procedures that should be followed when servicing them.

In addition to the “hands-on” trouble-shooting and testing of actual refrigerators, the workshop will include an excellent video presentation that takes you through every step of trouble-shooting refrigerators.  The video has excellent views of cut-away refrigerators and working parts of the system.  In addition to the video, a working mock-up of a refrigerator will be used for demonstration, and for trouble-shooting by the workshop participants.

PLEASE NOTE:  This workshop is intended to be presented ON SITE ONLY for agencies that have refrigerators that can be worked on during the workshop. It could also be beneficial for more than one agency to coordinate with other agencies to sponsor this training.

If your agency has a number of refrigerators that are not being used, or that are in storage waiting to be diagnosed, this workshop could be quite helpful for your organization. TSA requests that any agency or agencies that sponsor this on-site workshop please supply refrigerators that are working, but that have problems, and refrigerators that are not working. These refrigerators will be used during the workshop.  This allows the sponsoring agencies a two-fold benefit. Their Maintenance staff members receive excellent training in servicing and maintaining refrigerators, and their unused refrigerators get diagnosed and, hopefully, repaired (if parts are available.)

Detailed workbooks that explain HOW TO perform refrigerator trouble-shooting, servicing, and repairs will be provided to each participant, which can later be used as reference material when performing future servicing.  TSA certificates will be presented to all workshop participants.


Day One, 8:00 am – 4:00 pm,   Day Two, 8:00 am – Noon

  1. Refrigeration System Fundamentals Related to Refrigerators
    • Compressors
    • Condensers
    • Evaporators
    • Capillary Tube Metering Devices
    • The Refrigeration Cycle
    • Heat Exchangers in Refrigerator Sealed Systems
    • Conventional Refrigerators
    • Cycle Defrost Refrigerators
    • Frost-Free Refrigerators
  2. Understanding Air Flow Systems In Frost Free Refrigerators
    • Condensing Air Flow
    • Evaporator Air Flow
  3. The Refrigerator Electrical System and Its Components
    • Understanding Wiring Diagrams and How to Use Them
    • Compressor Motor Windings
    • Relays and Start Capacitors
    • Compressor Overload Protectors
    • Evaporator Fan Motors
    • Condenser Fan Motors
    • Fan and Light Switches
    • Thermostats
    • Defrost Timers
    • Defrost Termination Thermostats
    • Defrost Heaters
  4. Using Meters To Troubleshoot Refrigerator Electrical Components
    • Using a Voltmeter
    • Testing Current Draw
    • Understanding Testing for Resistance
    • Understanding Testing for Continuity
  5. Specific Troubleshooting Problems (Hands-On)
    • Refrigerator not cooling, no light, and nothing works, or only the light works
    • Not cooling, compressor runs, or one or both sections are not cool enough
    • Compressor tries to start but clicks off
    • Refrigerator too cold and freezes everything or freezes just in random areas
    • Refrigerator runs too much and water deposits form on walls
    • Freezer has snow on evaporator cover and food section is not cooling enough
    • The cabinet light does not work
    • There is an odor in the refrigerator
    • There is water on the floor near the refrigerator
    • Something electrical smells like it is burning
    • Other problems brought up by the workshop attendees
    • Tips on ordering parts

If you would like to have more information about holding this workshop in your area, please CONTACT US.  Be sure to tell us in the message section which workshop(s) you are interested in.