channel it into the rotating hamper. The warmed air
picks up moisture from the laundry, as it passes
through the hamper. The blower finally directs the
moisture-laden air through a lint filter that traps most
of the dry, lightweight particles of lint and other
foreign materials picked up by the moving air before
the air is discharged from the dryer.
The heating assembly in an all-electric dryer
consists of a set of nichrome heating elements situated
in the forced-air steam. The heating assembly in a gas
dryer performs exactly the same function, but it uses
gas flame heat.
The electrical sections of modern clothes dryers
can be rather simple compared to some other kinds of
modern appliances. The basic electrical units of a
dryer include heating controls that maintain a fairly
constant drying temperature and a timer mechanism
that turns off the dryer at the end of a selected drying
interval. The essential differences between the
simpler dryer models and the top-of-the-line versions
can be found in the number and types of heat and timer
All automatic dryers include a basic cycle that is
normally labeled a "Timed Cycle" on the timer control
knob. When operation is done in this mode, the dryer
tumbles the laundry continually and regulates the level
of the forced air throughout the entire drying interval.
The tumbling and heating actions both stop at the end
of the selected drying time. You can set the drying
interval to any point between zero and about
180 minutes, depending on the amount and wetness of
Automatic clothes dryers operate on a simple
principle, involving the following essential parts:
An exhaust fan
A perforated metal drum
An electric motor to rotate the drum
A source of heateither gas or electric.
In operation, wet or damp clothes are placed into
the drum, and after the door is closed, the thermostatic
control is set to the correct heat level; the timer is also
set to the desired running time. The best temperature
and running time combination depends on the type of
clothing, the material of which it is made, the weight of
the clothing, and the amount of water it contains. The
correct combination for various loads is normally
indicated on a chart near the control knobs; if not,
consult the owner's manual.
Once the correct control combination has been set,
the drum begins to rotate at about 50 revolutions per
minute, and the heat turns on to start the drying
function. Air circulation is provided simultaneously
by the motor-driven fan, circulating the heated air
through the clothing. Baffles on the sides of the drum
tend to carry the clothes to the top of the dryer drum, at
which time they drop to the bottom. These baffles
prevent the clothes from lumping together and provide
a tumbling action that speeds up the drying process.
The door may be opened at any time during the cycle.
When the controls are functioning properly, any
opening of the dryer door stops the dryer cycle, turning
off the heater and other motors. If more time remains
in the cycle, the drying action resumes when the door is
closed; in some cases, the start button must be pressed.
Although a motor drive belt may break from time
to time or a bearing becomes jammed, most problems
involving automatic clothes dryers are in the automatic
controls. In most cases, the contacts become worn,
wiring becomes short-circuited or open, and so on.
When installing a dryer, either a new one or one
that has been repaired, observe all codes and
ordinances that apply to the particular dryer. The
information below will help you in installing,
repairing, and locating a dryer. Leave enough space
around the dryer for ease of installation, use, and
If the dryer is to be installed in a confined area,
such as a closet or bathroom, it must be exhausted to
the outside. Furthermore, it must have enough space
around it and enough air circulation to operate
The electric service should conform with the
National Electric Code as well as local codes and
ordinances. When gas is used as the heat source, the
installation must conform to the National Fuel Gas
Code and local codes and ordinances.
Never exhaust the dryer into a chimney or any
other duct or vent. The dryer must have its own
exhaust system. Before putting a dryer into use after
installing or servicing, replace all access and service
panels. If still attached, read and follow all caution and
direction labels attached to the dryer.
While servicing, review the wiring diagram that
accompanies the dryer. This diagram is usually