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Figure 4-18. Control module less cover.
4-45. Testing
a. General. Remove four screws securing cover to
frame. Remove capillary tube grommet and slide
cover from module. Pull capillary tube bulb
through hole in cover. To test individual com-
ponents, mark and disconnect leads, and check for
continuity. Refer to schematic diagram as a guide
and refer to the following additional instructions.
b. Circuit Breaker. Check for continuity between
corresponding terminals in closed position. Check
for proper functioning in open position. Replace
defective circuit breaker.
c. Evaporator Fan Toggle Switch. Check for
continuity in both positions. Replace defective
switch.
d. Temperature Selector Switch. Check for
4-28
continuity between common terminal 1 and blue
terminal 2 (blue). Switch should close on tem-
perature drop below setting. Turn switch knob to
full “COOLER” position. Switch should be open.
Turn switch knob toward warmer. Switch should
close as setting becomes higher than bulb tem-
perature. Replace defective switch.
e. Mode Selector Rotary Switch. Refer to wiring
diagram chart showing connections made by switch
in various switch positions. Check for continuity.
Replace defective switch.
4-46. Disassembly
a.
General. Disassembly is limited to
replacement of individual controls. Remove control
module cover and mark and disconnect leads of
control to be replaced.
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