Thermistor/Atc Control (Auto Temp) - GE Profile WPGT9150 Technical Service Manual

5. Remove the 2 Phillips-head screws that hold the
drain pump mounting plate to the washer fl oor.
6. Disconnect the 2 drain pump wires.
7. Remove the 2 Phillips-head screws that hold the
drain pump to the mounting plate. Remove the
drain pump.
Caution: Care must to taken when reinstalling and
sealing the drain hoses to the outer tub to ensure
there is no water leakage.
Note: When installing the drain pump, apply a thin
coat of sealing compound (part no. WH60X15) to the
inner surface of the drain hoses.
Disconnect
Disconnect
– 24 –

Thermistor/ATC Control (Auto Temp)

• The ATC control uses a water temperature
sensor (thermistor) to regulate the wash water
temperature.
• The thermistor has a negative temperature
coeffi cient (as temperature increases, resistance
decreases).
• The thermistor is located in the bottom of the
outer tub, under the wash basket.
Bottom View
Thermistor
To determine the temperature of the incoming
water, the washer control measures the difference
between the voltage sent and the voltage returned
from the water temperature sensor. The washer
control then makes temperature adjustments
accordingly.
The washer control should maintain the water
temperature in the tub within +/- 5°F (+/- 3°C) by
opening or closing the hot and cold water valves.
The thermistor has an approximate resistance value
of 121K Ω at 70°F (21°C).
Approximate resistance values at:
Ω
• 60F° (16C°) - 141K
Ω
• 80F° (27C°) - 86K
Ω
• 105F° (40C°) - 48K
Ω
• 120F° (49C°) - 35K
White
White
AUTO
Gray
TEMP
Dk. Blue
Purple
Gray
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