– 34 –
Fresh Food and Freezer Thermistors
The fresh food thermistor
is located in the left
wall of the fresh food compartment. The freezer
thermistor
is located in the right wall of the freezer
compartment.
Note:
The fresh food and freezer thermistors are
removed in the same manner.
To remove the thermistor cover, insert a
fl
at blade
screwdriver under the front of the cover and gently
lift the bottom edge until it releases from the
compartment wall.
Note:
To accurately test a thermistor, place
the thermistor in a glass of ice and water
(approximately 33°F (0.5°C)) for several minutes and
check for approximately 16K
Ω
.
Ambient Thermisto
r
The ambient thermistor is located under the freezer
compartment and connected at J1-2 on the main
control board. (See
Component Locator Views
.) It
assists the main control board in compensating for
room ambient that is higher or lower than 60°F (15°C).
For example, in ambient below 60°F (15°C), the fresh
food temperature control will shut down properly. The
cooler room ambient assists in keeping fresh food
temperature at the preset temperature. However, the
compressor does not get enough run time to bring
the freezer down to 0°F (-18°C).
Thermistors
At lower room temperatures, the ambient thermistor
alters the main control board’s calculations for the
target temperature. The main control board then
runs the compressor at higher speeds to get the
freezer, as well as the fresh food, to an acceptable
temperature.
If the external thermistor is not functioning, the
main control board default will assume the ambient
temperature is 90°F (32°C) and there will be no
adjustment to the fresh food or freezer set point.
The ambient thermistor is attached to the front
of the base (under the left side of the freezer
compartment) with a plastic wire tie.
Insert
Lift
Thermistor Cover
Wire Tie
Ambient
Thermistor
(
Continued next page
)
Components
Thermistor Values
Temperature
Degrees (F)
Temperature
Degrees (C)
Resistance in
Kilo-Ohms
-40
-40
166.8 k
Ω
-31
-35
120.5 k
Ω
-22
-30
88 k
Ω
-13
-25
65 k
Ω
-4
-20
48.4 k
Ω
5
-15
36.4 k
Ω
14
-10
27.6 k
Ω
23
-5
21 k
Ω
32
0
16.3 k
Ω
41
5
12.7 k
Ω
50
10
10 k
Ω
59
15
7.8 k
Ω
68
20
6.2 k
Ω
77
25
5 k
Ω
86
30
4 k
Ω
95
35
3.2 k
Ω
104
40
2.6 k
Ω
113
45
2.2 k
Ω
122
50
1.8 k
Ω
131
55
1.5 k
Ω
140
60
1.2 k
Ω
