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4-18. Thermostatic Switch
a. Removal.
(1) Disconnect power to the unit.
(2) Remove the control panel. (fig. 3-2 and 3-
(3) Remove the evaporator rear panel. (fig. 3-
1).
(4) Refer to figure
4-10 and remove the
thermostatic switch.
b. Cleaning and Inspection.
(1) Wipe switch with a clean dry lint free
cloth.
(2) Tighten all loose terminals or replace
missing hardware.
c. Test.
(1) Place switch No. 3 in COOL position.
(21 Touch probes of multimeter to terminals 1
and 2 of thermostat and continuity should be in-
dicated.
(3) Rotate the thermostatic switch towards
the warm position until a click is heard in the
switch.
(4) Touch the probes of the multimeter to
terminals 2 and 3 and continuity should be in-
dicated. If continuity is not indicated the switch is
defective and should be replaced.
d. Installation.
(1) Refer to figure 4-10 and install ther-
mostatic switch.
(2) Install control panel. (fig. 3-2 and 3-6).
(3) Install the evaporator rear panel. (fig. 3-
1).
(4) Connect power to unit.
4-17
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