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TM5-4120-376-14
4-23. AMBIENT THERMOSTAT AUXILIARY POWER INLET/Inspect, Test, Repair, Replace
(Cont)
LOCATION/ITEM
Removal:
9. Remove
10. Remove
Inspect:
plastic tie wraps.
ambient thermostat switch assembly (S-7).
1. Inspect for damage.
2. Repair or replace if damaged.
Test:
1. Using an ohmmeter or other continuity tester, check continuity of red and black wires.
Continuity should be indicated up to 100°F.
2. If continuity is not indicated replace ambient thermostat switch assembly (S-7).
3. Tape the bulk of a thermometer or junction of a thermocouple to the body of the ambient
thermostat switch assembly (S-7) and leave the continuity tester connected to the red and black
wires.
4.
5.
6.
Gradually apply heat, and observe both the thermometer and continuity tester.
Continuity should drop out at 100 + 4°F (38°C).
While still continuing to watch the thermometer and the continuity tester, let the ambient
thermostat switch assembly (S-7) cool.
7. Continuity should be re-established at 100 +/- 4°F (38°C).
8. If the ambient thermostat switch assembly (S-7) thermostat does not meet temperature
and continuity requirements, replace ambient thermostat switch assembly (S-7).
Installation:
1. Align ambient thermostat switch assembly (S-7) (13) with holes in housing and secure with
two screws (12) and two lock washers (11).
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