Service manual

16
C. Thermistor Check
The cabinet thermistor is used for cabinet temperature control and the defrost thermistor
is used for defrost cycle initiation (39°F (3.8°C), defrost termination (41°F (5°C), and
EvapFM initiation after defrost (36°F(2°C) or lower). Thermistor resistance varies
depending on temperature. The control module monitors the thermistors to control
system operation.
No adjustment is required.
To check thermistor resistance, follow the steps below.
1) Unplug the appliance.
2) Remove the front panel.
3) Disconnect and remove the thermistor in question.
4) Immerse the thermistor sensor portion in a glass containing ice and water for 2 to 3 min.
5) Check the resistance between the wires at the thermistor connector. Normal reading is
within 16.0 to 16.7 kΩ. If outside the normal reading, replace the thermistor.
6) Reconnect and replace the thermistor in its correct position. See "IV.B. Component
Service Information."
7) Plug the appliance back in.