Procedure
F:
Measuring Thermistor Resistance
An
open thermistor
will
prevent
the
compressorfrom running.
1 . Tum off refrigerator.
2. Disconnect the thermistor assembly wire from
DC power
board jumper.
See Figure 19.
3.
Measure thermistor resistance at connector pins as
follows.
8 lnmerse the thermistor in a bath
of
ice as shown in
Figure
20 to determine if the resistance values
change with temperature changes
II
Cross reference thermistor resistance reading using
the Resistance Value Table to determine known
temperatures.
1/J
If the thermistor resistance measures within
1.6-29
kOhm, the thermistor is good
II
Replace the thermisto if the reaing is OL.
DC P
ower
S
upply
·-
Co
n
necto
r
ju
m
pe
r-
T
hermi
s
to
r
; - "
'""''"
....
b,
""
Connector
jumper
-
Compressor
Figure
19.
Thermistor
connection
jumper.
Thermistor
Resistance
Values Tabl
e.
Thermistor
Temperature
-18
-12
-7
-1
Allowable
Resi
stance
(in
kilo
Ohm
[kQ])
Minimum-Maximum
0
10
20
30
40
50
60
70
80
90
4
""""""""""""""
"
""""""
""
""""
""
8.
7-10
.7
7.
0-
8.6
5.7-
7
.0
4.8-
5.7
4.
0-
4.9
3.2-
4.0
2.
5-
3.1
1.
9-
2.3
1.7-
2.0
1.
6-
1.9
10
16
21
27
32
Figure
20.
Checking
Thermistor
resistance
with
ice
bath.
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