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E. Thermistor Check
To check thermistor resistance, follow the steps below.
1) Turn off the power supply.
2) Remove the front panel, then move the control switch to the "OFF" position.
3) Remove the control box cover.
4) Remove the thermistor.
5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or
3 minutes.
6) Disconnect the white thermistor connector from the control board WHITE K3 connector
and check the resistance between thermistor leads. Normal reading is within 4.7 to
6.2 kΩ. If outside the normal reading, replace the thermistor. See "V.B. Important Notes
for Component Replacement." If inside the normal reading, continue to the next step.
7) Replace the thermistor in its correct position. See "V.B. Important Notes for Component
Replacement."
8) Reconnect the white thermistor connector to the control board WHITE K3 connector.
9) Replace the control box cover in its correct position, then turn on the power supply.
10) Move the control switch to the "ICE" position.
11) Once the harvest cycle starts, begin timing the harvest cycle.
12) The harvest timer should expire and terminate the harvest cycle within 2 to 3 minutes. If
the harvest timer does not expire and terminate the harvest cycle, the harvest timer is
bad and the control board should be replaced.