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Thermistor Part Number 38822. See form M164 for the standard operating procedure.
Establish Thermistor Temperature
Check the display's temperature reading.
If a thermometer is available, use it to confirm the display's
temperature reading by taking the temperature at the
thermistor.
If the previously stated tasks are unavailable, then use any
reasonable means to estimate the thermistors temperature.
Multimeter Set-up
Use a multimeter and set it to the resistance (Ω) setting. See
Figure 1.
Disconnect the thermistor from the controller, then connect the
multimeter to the thermistor. See Figure 1.
Check and compare the multimeter's reading to Table 1.
Analyze Results
If the resistance and temperature are similar, then the
thermistor is working properly and does not need to be
replaced.
If the resistance and temperature are not similar or the
resistance's value is not on Table 1, then the thermistor is not
working properly and needs to be replaced.
If the resistance reads over-limit, then the thermistor is not
working properly and needs to be replaced.
P/N 45810 - Rev A - By AV - 7/3/19
Thermistor Field Testing
Figure 1
7
Table 1
Temp
Temp
Ohms
(°F)
(°C)
(kΩ)
-22.0
114.56
-30
-18.4
103.18
-28
-14.8
93.07
-26
-11.2
84.06
-24
-7.6
76.03
-22
-4.0
68.87
-20
-0.4
62.46
-18
3.2
56.71
-16
6.8
51.56
-14
10.4
46.94
-12
14.0
42.78
-10
17.6
39.04
21.2
35.66
24.8
32.62
28.4
29.86
32.0
27.37
35.6
25.11
39.2
23.06
42.8
21.20
46.4
19.51
50.0
17.98
53.6
16.58
57.2
15.3
60.8
14.13
64.4
13.07
68.0
12.09
71.6
11.2
75.2
10.38
78.8
9.63
82.4
8.95
86.0
8.31
89.6
7.73
93.2
7.2
-8
-6
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
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