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Defrost Thermostat
The defrost thermostat will open its contacts and
de-energize the heater whenever the evaporator
temperature reaches approximately 55°F. The
thermostat contacts will close at approximately
32°F. The thermostat is attached to the evaporator
with a metal clip.
Overtemperature Thermostat
The overtemperature thermostat will open its
contacts and de-energize the heater whenever the
evaporator temperature reaches approximately
140°F. The thermostat contacts will close at
approximately 110°F. The thermostat is attached to
the evaporator with a metal clip.
Overtemperature
Thermostat
Defrost Thermostat
Clip
Clip
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 Ω.
Fresh Food and Freezer Thermistors Model PFSF2
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.
Thermistor Resistance
Temperature
(°F)
Temperature
(°C)
Resistance in Kilo-
Ohms
-40 -40 166.8K Ω
-31 -35 120.5K Ω
-22 -30 88K Ω
-13 -25 65K Ω
-4 -20 48.4K Ω
5 -15 36.4K Ω
14 -10 27.6K Ω
23 -5 21K Ω
32 0 16.3K Ω
41 5 12.7K Ω
50 10 10K Ω
59 15 7.8K Ω
68 20 6.2K Ω
77 25 5K Ω
86 30 4K Ω
95 35 3.2K Ω
104 40 2.6K Ω
113 45 2.2K Ω
122 50 1.8K Ω
131 55 1.5K Ω
140 60 1.2K Ω
Thermistors
(Continued next page)