Selector Switch - TM-5-4120-282-130046

(3) Position the air conditioner nameplate and secure with the

three screws.

(4) Position the control knobs on the thermostat, selector switch

and fresh air control and secure with set screws.

Selector Switch (figure 1)

a. Removal.

Remove left-side panel (para 39).

(1)

(2) Remove the knobs from the thermostat, selector switch, and

fresh air control knobs by loosening the set screws in each.

Remove the name

Remove the three screws from the name plate.

(3)

plate.

(4)

Remove the two mounting screws and remove the switch from the

panel.

(5) Tag and disconnect the wiring harness from the selector switch

and remove it from the unit.

b. Cleaning and Inspection.

(1) Clean the selector switch with a soft cloth dampened with

cleaning solvent.

(2) Inspect the selector switch for damaged terminals or improper

operation.

(3) Replace a defective selector switch.

c. Testing.

(1) Locate the three positions of the switch making reference to

the control panel. Set the switch on OFF position.

(2) With the leads of a multimeter set on resistance, make contact

between the terminal with a copper bar, and each of the other terminals

should read a high resistance on the meter.

(3) Rotate the switch to FAN position. A high resistance should

be read on the compressor terminal and a low resistance of the fan

terminal. Otherwise, the switch is defective.

(4) Rotate the switch to COOL position. Low resistance should be

between the terminal with a copper bar and each of the other two ter-

minals. Otherwise, the switch is defective.