70 Part Number: 040006847 12/19
Function
The sump water thermistor sensor is immersed in water to
detect the sump temperature. The value supplied to the
control board is used to initiate a freeze cycle.
The liquid line thermistor senses the refrigeration system
liquid line temperature. This is used in conjunction with
the control board to determine the length of the freeze
and harvest cycles.
Specifications
The sump water thermistor:
R2.0 °C ± 0.5 °C = 14.75 K-ohm ± 1%
The liquid line thermistor:
R25 °C ± 0.5 °C = 10 K-ohm ± 1%
Check Procedure
1. Make sure the thermistor sensors are installed
correctly.
2. Disconnect the thermistor from the control board and
measure its resistance values.
3. Measure the temperature at the thermistor.
4. Compare the measured resistance/temperature.
Measured resistance/temperature is within 10% of the
published resistance value—the thermistor is good.
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