Figure 3-8. Condenser fan removal and installation.

TM 5-4120-273-15

Figure 3-8. Condenser fan removal and installation.

b. Inspection. Inspect for cracked or broken

3-29. Selector Switch

case.

a. Removal. Refer to figure 2-1(1) and remove

selector switch.

c. Testing. Test for continuity across protector.

Refer to figure 1-5 to establish points for continu-

b. Testing. Test for continuity across coils us-

ity.

ing multimeter set on OHMS. Refer to wiring dia-

gram figure 1-5 to establish points of continuity.

d. Installation. Refer to figure 3-11 and install

c. Installation. Refer to figure 2-1 and install

diode surge protector.

selector switch.

3-28. Control Box

3-30. Hi-lo Fan Speed Switch

a. General. The control box houses the selector

a. Removal. Refer to figure 2-1 and remove

switch, thermostat, and hi-lo fan speed switch. It

fan speed switch.

is mounted on the junction box. The selector

b. Testing. Test for continuity. Refer to wiring

switch is a manually operated, five-position

diagram figure 1-5 to establish points of continu-

switch. Automatic control of both the heating and

ity.

cooling cycles is provided by the thermostat. The

hi-lo fan speed switch controls the fan speed. The

c. Installation. Refer to figure 2-1 and install

control box may be used in a remote position by

fan speed switch.

utilizing a blockoff plate and remote control cable,

Refer to paragraph 2-5e(2).

3-31. Thermostat

b. Inspection. Inspect for loose knobs and

a. Removal. Refer to figure 2-1 and remove

switched.

thermostat.