Hoshizaki HFE-127MA-CHD, Service Manual

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[b] CHECKING THERMISTOR
1) Remove the thermistor from the controller.
2) Put ice and water in a glass or other container to make 0°C water. Immerse the
thermistor bulb in the water for 5 minutes (at the center of the container).
3) Use the Ω range of the tester to measure the resistance between the thermistors.
4) If the measured resistance is not within 25 - 30 kΩ (standard 27 kΩ), replace the
thermistor (see the T-R curve below).
T-R Curve (Interior/Defrost Thermistor)
The graph shows reference values only and may differ from actual values.
0
10
20
30
40
50
60
70
80
90
100
110
120
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature (°C)
R
(k
Ω
)