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Page Title:
MODE SELECTOR SWITCH S1. (Cont) |
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 TM5-4120-383-14
4-24.
MODE SELECTOR SWITCH
S1.-Continued
(4) Loosen setscrew in the TEMPERATURE SELECTOR knob.
Remove
knob.
(5) Remove the three screws from the posts and slip back
plate off.
(6) Tag and disconnect wires from MODE SELECTOR switch.
(7) Loosen setscrew and pull knob from MODE SELECTOR switch.
(8) Remove nut and washer and pull MODE SELECTOR switch from
the panel.
b. Test.
See the mode position chart below and check
continuity at pins indicated to each of the positions indicated.
Replace the switch if continuities are not in accordance with those
indicated.
MODE POSITION CHART
Position
Function
Switch Section and Terminals Connected
S1A
S1B
S1C
S1D
1
HEAT (HIGH)
21 and 2C
41 and 4C
12 and 1A
31 and 3C
22 and 2B
32 and 3A
42 and 4A
2
HEAT (LOW)
21 and 2C
31 and 3C
12 and 1A
22 and 2B
3
OFF
4
21 and 2C
31 and 3C
VENT
22 and 2B
5
41 and 4D
21 and 2C
32 and 3B
COOL
12 and 1B
42 and 4B
22 and 2B
31 and 3C
11 and 1D
4-69
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