TM 9-4120-404-14
b. Test
(1) Using a multimeter check that circuits are closed across terminals 1 & 2 and 3 & 4.
(2) Infinity reading across any terminals indicates a defective thermostat and it must be replaced.
c. Installation.
(1) Position heater cutout switch (4) on thermostat switch bracket (5).
(2) Install two spacers (3), two lock washers (2) and two screws (1) onto heater cutout switch (4).
(3) Connect wires per tags installed during removal and then remove tags.
(5) Reconnect air conditioner to power source.
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