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Evaporator Thermistor
The evaporator thermistor is clipped to the outlet
of the evaporator coil. The thermistor is used to
monitor evaporator temperature and terminate
defrost when the thermistor reaches 55°F.
Evaporator Thermistor Diagnosing
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 ohms. Testing
points are listed to the right and thermistor values
chart is listed below.
Thermistor Values
Temperature
Temperature
Degrees
Degrees
(°F)
-40
-31
-22
-13
-4
5
14
23
32
41
50
59
68
77
86
95
104
113
122
131
140
Resistance
in Kilo-
(°C)
Ohms
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
J1 on Main Board:
Pin 4 (white/green) to pin 5 (red/white)
Evaporator Thermistor Removal/Replacement
1. Remove the icemaker (if installed).
2. Remove the evaporator cover (see
Evaporator Cover Removal steps).
3. Remove the thermistor from the outlet tube of
the evaporator.
NOTE: The evaporator thermistor can be
replaced individually or as part of the evaporator
harness.
4. If replacing the thermistor as part of the
evaporator harness, disconnect the 6 pin
cabinet connector and the defrost heater
connectors. If replacing the thermistor by
itself, proceed to the next step.
5. Cut the thermistor wiring as close to the
thermistor as possible.
6. Using two bell connectors (Part #:
WR01X10466), splice the wiring. After the
fully with silicone grease (Part #: WR97X163).
Silicone Grease
7. Clip the thermistor into the outlet line of the
evaporator.
– 29 –
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