TM9-4120-370-14
TO35E9-229-1
4-61. HEATER THERMOSTAT(S3) - Continued,
(4) Remove thermostat.
b. Test. With thermostat at room temperature, use a Multimeter set on the lowest OHMS scale to check for
continuity between each pair of contacts (4 and 6, 4 and 5, and 5 and 6), If continuity is not indicated between
all contacts, replace the thermostat,
NOTE
For full operational test of thermostat use an external heat source. Thermostat should
open (no continuity across contacts) at temperature increase of 194F 9 (90C 5)
and close at temperature decrease at 142F 16 (61C 9).
Installation
c.
(1) Using screwdriver and wrench, secure thermostat to bracket with two screws, flat washers, and nuts.
(2) See tags and wiring diagram (Figure 4-20) and connect wire leads.
(3) Remove tags,
(4) Carefully tie wires so that they cannot contact heaters.
Follow-on procedure:
4-62. HEATER ELEMENTS (HR1 THROUGH HR6)
Preliminary procedure:
a. Removal
(1) Check to see that power has been disconnected,
Tag and disconnect the wire leads from the heater that is being removed,
(2)
(3)
Using a screwdriver loosen the two captive panel fasteners in the retainer channel
(4)
Pull heater element free of lower mounting clip and remove heater.