This guide has been designed to provide a thorough and practical study of
the major appliances used in most residences. This guide will provide a basic
knowledge of electricity, electronics, refrigeration, and major appliance operation.
This guide is designed to be a complete text for anyone wanting to learn this
exciting and rewarding field, especially those in a post-secondary training
The content emphasizes more practical aspects of the subject matter. Wherever
possible, sections are included that cover the operation, maintenance, troubleshooting,
and repair of major appliances.
MY APPROACH and PHILOSOPHY
1. The fundamentals necessary for successful servicing of major appliances
are covered first, along with sections on safety, the service occupation, customer
relations, tools and instruments, service techniques, installation, basic electricity
and electronics, proper lubrication procedures, refrigeration principles, air
control, water chemistry, and combustion.
2. The operation sections contain in-depth information on how each appliance
is designed to work. The theory of operation is presented in clear, familiar
terms so that the beginning learner is not discouraged or confused.
3. This guide is written using common terminology and language pertaining
to the field.
4. Each section is concluded with QUIZ (where applicable) that the learner
should be able to answer after completing the section.
- Section 1 provides the learner with
the common safety procedures used in the major appliance industry. This section covers the safety of the worker, safety of the equipment, and safety of the contents, in addition to welding
safety, safety in handling refrigerants, safety in working with electricity
and electronics, and safety in working with solvents.
- Section 2 covers
the occupation of major appliance servicing. Also presented
are the nature of the work, the responsibilities and different classifications
of appliance technicians, problem solving techniques, customer relations,
advancement, effective use of time, and the need to continue learning the
business and covers the basics of customer relations involved in the major
appliance service business. Also covered are appearance, work habits, and
the ability to communicate effectively.
- Section 3 provides
an overview of the tools and instruments used in the trade. Each of the tools and instruments common to the field
of appliance service is presented separately, so the learner will have knowledge
of its use when it becomes necessary to use it.
- [under constr.] Section 4 introduces the learner to basic electricity
and electronics. The electron theory, sources of electricity, resistance,
electrical and electronic circuits, diagrams, charts, P and N materials,
current carriers, diodes, transistors, IC circuits, circuit boards, and modules
are covered, along with control problems and unusual service problems.
- Section 5 covers the reasons for
proper lubrication, how lubrication works,
bearing types, bearing failure, and bearing replacement procedures.
- Section 6 introduces the learner
to the principles of refrigeration. Also
presented are heat flow, heat laws, pres sure, temperature, pressure-temperature
relationships, the refrigeration cycle, flow control devices, trouble diagnosis,
and service procedures.
- Section 7 covers the basic control
of air in buildings. Air movement,
pollutants, filtering, germicidal and ozone lamps, the effects of temperature
and humidity, and air system maintenance are also presented.
- Section 8 presents the chemistry
of water, water testing, detergents,
and the different qualities of water to the learner in familiar terms so
that the material can be easily understood.
- Section 9 covers the fundamentals
of combustion. The different types of
fuels used with appliances, the combustion process, the different types of
flames, and the upper and lower limits of flammability are also presented.
- Section 10 covers the operation
of room air conditioning units. Sizing
room units, air systems, electrical diagrams, the refrigeration cycle, and
troubleshooting charts are also presented.
- Section 11 covers domestic refrigeration systems, their operation, location,
automatic ice makers, electrical problems, electrical diagrams, and troubleshooting
- Section 12 presents domestic freezers, their operation, location, refrigerant
cycle, electrical components, electrical diagrams, and troubleshooting
- Section 13 covers the use and operation of dehumidifiers, along with the
different types and their capacities. Section 13 also discusses the need
for humidification equipment in buildings. The effects of different types
of water, air flow, water flow, and maintenance are also presented to the
- Section 14 covers dishwashers. The installation, operation, electrical
power supply, water supply, use, opera- lion, and service procedures are
also presented. Trouble shooting charts and electrical diagrams are presented
to aid the learner in understanding dishwashers.
- Section 15 presents electric and gas dryer installation, operation, component
replacement, electrical diagrams, component location, burner adjustments,
and troubleshooting charts to the learner.
- Section 16 covers gas laundry centers. Washer and dryer construction and
operation are covered. Also included are maintenance and component replacement
procedures to help the learner understand these operations.
- Section 17 presents the theory
of microwave ovens. Use, safety procedures,
installation, service procedures, electrical diagrams, test instruments,
and troubleshooting charts are also covered.
- Section 18 covers electric wall oven operation and maintenance. Self-cleaning
ovens, electrical diagrams, and troubleshooting charts are also provided
to the learner.
- Section 19 discusses the operation and maintenance of gas ranges. Also
presented are control adjustments, burner adjustments, and gas ignition.
It’s difficult to express the amount of self-satisfaction realized when a
dedicated appliance service technician success fully completes a service procedure.
This satisfaction comes from knowing that a correct and economical service
has been provided to a fellow human being.
To achieve this type of success requires dedication to learning and use of
this knowledge in performing appliance service work. The knowledge is gained
through study and understanding information such as that presented in this
textbook. The more a person knows about a given machine, the easier the troubleshooting,
maintenance, and repair of that machine becomes.
Each brand and model of appliance will be a little different from the rest.
However, when the basics are known, they can be applied to aid in determining
the cause of the problem and the steps required in repairing it. This guide
provides that basic information.
There are several steps that you can take to make certain that you are getting
the most from this guide and course. The first step is to become aware that
learning re quires active participation by you, both in the classroom and when
you are studying the material in this textbook. You must take an active part
in the theory as well as in the laboratory exercises.
There are several habits that must be developed. First, you must regularly
attend class. While in class, don’t sit back and let someone else do the projects.
To learn the most be active in class participation.
You should take time to learn the terminology used in the appliance industry.
You need to know these terms so that you can apply them correctly at the proper
time. Take time to commit the meaning of new terms to memory.
Follow the procedures and examples given in the text book. This will help
you develop the analytical skills that are so important in appliance service
work. Remember that practice, in addition to study, will help you tremendously
in developing service skills.
You should realize by now that there is a lot involved in being an active
learner. However, the knowledge gained will be well worth the extra effort.
Your skills as an appliance service technician will be indicated by your increased
ability to service appliances. This increased ability will also be rewarded
by better pay and recognition. My best wishes go with you always.
Table of Contents
Section 1 SAFETY
- Safe Servicing Practices
- Safety Procedures
- Welding Safety (Oxy-acetylene)
- Safety in Handling Refrigerants
- Safety in Working with Healing Equipment
- Safety in Working with Electricity and Electronics
- Working on Energized Circuits
Section 2 THE APPLIANCE SERVICE OCCUPATION
- Classification of Appliance Personnel and Their Responsibilities
- Requirements for Appliance Technicians
- Repairing the Machine
- Pre-service Inspection
- Customer Instructions
- Use of Your Time
- Service: A Necessity
- Education: A Never-ending Task
- Customer Relations
- Things to Remember when Working with Others
- Affecting the Customer’s Attitude
- Understanding Yourself
- Knowing Your Customers and Fellow Employees
- What to Expect from Good Human Relations
Section 3 TOOLS and INSTRUMENTS
- Tubing Cutters
- Flaring Tools
- Tubing Reamers
- Reversible Ratchets
- Gauge Manifolds
- Pocket Thermometers
- Charging Cylinders
- Fitting Brushes
- Test Instruments
Section 5 MACHINE LUBRICATION
- Equipment Design
- Lubricant Properties
- Shaft Seals
Section 17 MICROWAVE OVENS
- Use of Controls
- Installation Information
- Electrical Grounding
- Testing Outlets
- Disassembly, Adjustments, and Replacement of Parts