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4-39
TM 5-4120-377-14
Preliminary procedure:
Remove control panel. (See para 4-37.)
Figure 4-44. Temperature Control Thermostat (S2)
a. Access
(1)
(2)
(3)
(4)
Using allen wrench, loosen TEMPerature control thermostat knob setscrew.
Remove knob.
Using screwdriver and wrench, remove four screws and lock nuts that secure rear panel.
Pull rear panel away from box as far as harness will allow.
b. Inspection
(1) Check that leads are properly connected. (See wiring diagram, fig. 4-20.)
(2) Check that capillary line and sensing bulb are not damaged.
(3) Check TEMPerature control thermostat for signs of overheating or other obvious damage. Replace if
damaged.
c. Test
(1) Using multimeter, place probes on the red and blue terminals.
(2) Turn TEMPerature control thermostat shaft fully clockwise.
4-80
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