52
SERVICING
Checking OCT Thermistor
1. With power off, remove the thermistor leads from the
circuit board.
2. Check the thermistor for continuity. See chart above
for resistance values.
3. Replace thermistor if it does not test as above.
S-6 HEATER ASSEMBLY
1. Disconnect power to the unit
WARNING
2. Remove front cover of unit.
3. Remove the three screws securing the indoor fan mo-
tor cover and remove the cover. See Figure A.
4. Remove the 8 screws securing the partition panel top
to the chassis, Figure A.
5. Remove the 2 screws securing the two tie braces to the
partition panel. See Figure A.
Thermistor Resistance-Temperature Characteristic
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
0
10
20
30
40
50
60
70
80
90
100 110 120 130 140 150 160 170
T emperature (deg F)
R
esist
an
ce (
o
hm
s)
THERMISTOR RESISTANCE - TEMPERATURE CHARACTERISTIC
6. Remove the partition panel top
7. Remove the 4 screws on the top of the evaporator, Fig-
ure A.
Re
m
ov
e S
cre
w
s
Remove
Cover
Remove
Screws
Remove
Screws
Figure A
8. Remove the two screws on the left side panel securing
the motor panel assembly, Figure B.