Service manual

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The Electrical System
The electrical system consists of a combination
switch assembly,
heating
element
and
thermostat. The quickest method of diagnosing
the electrical system would be testing for
continuity of components.
Following the wiring diagram, the component
that does not show continuity would be
suspect.
THE
ELECTRICAL
SYSTEM
The selector switch should be checked for
continuity in the following manner. Remove all
wires from the assembly. Continuity should
exist between terminals 1 and 1 A and 2 and 2A
for the DC mode. When the switch is put in
the gas mode, you should have continuity
between 3 and 3A if the unit has an igniter
reigniter.
SWITCH ASSEMBLY
DC Mode
Gas
Mode A/C Mode
For the AC mode you should have
continuity between 4L and 4A and 5N and 5A.
If you find lack of continuity in any mode when
making these checks, the switch is defective
and should be replaced.
D-6-20
DC Mode
Gas
A/C Mode
Mode
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