TM 9-4120-402-14
4-45. HEATER CUTOUT (THERMOSTAT) SWITCH (S4).
This task covers:
a. Inspect
b. Test
c. Replace
INITIAL SETUP
Tools
Equipment Conditions
:
Refrigeration Unit Service Tool Kit
CAUTION
Appendix B, item 1
Soldering Gun Kit
Use disconnect switch (NOT POWER
Appendix B, item 2
CABLE) to disconnect power to unit.
Damage to cable connector pins will
Heat Gun
result if cable is used.
Appendix B, item 4
Disconnect power at power source.
Materials/Parts
Remove top panel (para 4-19).
Heater Cutout Switch
Lock Washers (2)
Appendix E, item 7
Insulation Sleeving
(Heat-Shrink Tubing)
Figure 4-46. Heater Cutout (Thermostat) Switch (S4)
a. Inspect.
Check general condition of heater cutout (thermostat) switch (1). Check that terminals are not damaged or
missing. Replace switch if damaged.
4-130
