Thermistor - Haier GE CDT800P2N3S1 Technical Service Manual

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Thermistor

The thermistor is located inside the turbidity
sensor. The thermistor monitors water
temperature in the tub. If the thermistor opens or
shorts it will cause an error (see Consumer Error
Mode in the Electronic Controls section of this
service guide). If it fails in open or shorted, the
control will default to the longest time algorithm.
Thermistor Specifications
Voltage
Resistance
.95 20066
1.56 10450
2.25 5824
2.91 3411
3.48 2081
3.91 1330
Turbidity Sensor Calibration
Calibration occurs every 100 cycles. After the
final rinse but before dry, the control will add three
extra rinse cycles. The first cycle will fill, circulate
two minutes and drain. The second cycle will
be a fill and drain. The third cycle will be a fill,
circulate, calibrate and drain. The cycle will now
advance to dry and complete.
Replacement controls will enter a calibration
at the end of the first cycle that the control
completes, as mentioned above. If the first cycle
is interrupted and calibration does not occur,
calibration will retry on the next cycle, until it is
completed. Calibration will not occur on demand.
Turbidity Sensor Diagnostics
If the turbidity sensor fails open or shorted, the
control will default to the maximum fills and
circulation time that the control is programmed for.
Use Consumer Error Mode to look for Turbidity
Sensor Faults.
To check the thermistor, access the Main Control
(see the Electronic Controls section of this
service guide), check resistance on connector
J806, pin 11, YR to pin 8, RN. The sensor may
also be removed, and the two outside terminals
may be checked. Use the table to the left to
calculate the correct resistance reading.
Temperature
50°F
75°F
100°F
125°F
150°F
175°F
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