Thermistors And Sensors; Thermistors - GE Monogram ZIPS360NHSS Technical Service Manual

Thermistors

The
temperatures inside and outside the refrigerator. To
test the thermistors, use the chart below.
Thermistor Values
Temperature Temperature
Degrees (F) Degrees (C)
-40° -40°
-31° -35°
-22° -30°
-13° -25°
-4° -20°
5° -15°
14° -10°
23° -5°
32°
41°
50° 10°
59° 15°
68° 20°
77° 25°
86° 30°
95° 35°
104° 40°
113° 45°
122° 50°
131° 55°
140° 60°
NOTE: To accurately test a thermistor, place
the thermistor in a glass of ice and water
(approximately 33°F) for several minutes and check
for approximately 16k.

Thermistors and Sensors

thermistors to read the
Resistance in
Kilo-ohms
166.8k
120.5k
88k
65k
48.4k
36.4k
27.6k
21k
0° 16.3k
5° 12.7k
10k
7.8k
6.2k
5k
4k
3.2k
2.6k
2.2k
1.8k
1.5k
1.2k
Ambient Thermistor
The ambient thermistor is located in the left side of
the machine compartment and mounted in front of
the humidity sensor with one Philips screw.
The ambient thermistor assists the main control
board in compensating for room ambient
temperature that is higher or lower than 60°F.
For example, in ambient temperature below 60°F,
the fresh food temperature control will shut down
properly. The cooler room ambient temperature
assists in keeping fresh food temperatures at the
preset temperature. However, the compressor does
not run enough to bring the freezer down to 0°F.
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 and there will be no adjustment
to the fresh food or freezer set point.
Diagnosing
The ambient thermistor resistance can be checked
between J14 and J5 connectors at the main board.
• J14 pin 1 - J5 pin 5
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