Test. - TM-5-4120-347-140083

TM5-4120-347-14

(7) Remove the four screws, washers and nuts and pull the temperature selector (thermostat) from the

back plate.

b. Test.

(1) Place the sensing bulb in a container of warm water, 85 to 100F (30 to 40C). Turn the knob to the

extreme COOLER position. Continuity should be indicated. Turn the knob to the extreme WARMER position.

There should be no indication of continuity.

(2) Place the sensing bulb in a container of cold water 40 to 65F (5 to 18C). Turn the knob to the

extreme WARMER position. Continuity should be indicated. Turn the knob to the extreme COOLER position.

There should be no indication of continuity.

c. Assembly (See figure 4-20).

(1) Place the temperature selector (thermostat) on the back plate and secure with four screws, washers

and nuts.

(2)

See the wiring diagram figure 4-5 and tags and connect wire leads. Remove the tags.

Align the holes in the back panel with the three posts and secure with screws.

(3)

(4) Check to be sure grommets are in place in the shaft holes. Install the two knobs and tighten the set

screws.

Slip the cover back in place and secure with four screws.

(5)

(6)

See paragraph 4-27c and figure 4-18 and install the control module.

(7)

Connect power at power source.

4-29. EVAPORATOR FAN SPEED SWITCH S2

The evaporator fan speed switch S2 is located in the control module.

a. Removal.

Disconnect input power from the air conditioner before performing maintenance on any part of the

electrical system. The voltages used can be lethal.

(1) Disconnect power at power source.

(2) See paragraph 4-27a and figure 4-18 and remove the control module.

(3) See figure 4-21 and remove four screws and pull the cover off.

(4) Loosen the set screws in the temperature selector and the control module mounting screw knobs.

Remove these two knobs.

(5) Remove the three screws from the posts and slip the back portion off.

(6) Tag and disconnect the wires from the evaporator fan speed switch.

4-47