Thermistor; Dosing Pump (For 900/905 Models Only) - Haier GE PTW600BPR DG Series Technical Service Manual

Thermistor

The thermistor and harness come as one
assembly that connects to the main board. It
comes with an O-ring that creates a watertight
seal around the probe itself. When reinstalling
the thermistor, ensure the thermistor is seated
properly. If it bulges, it will not seal properly.
Thermistor Resistance Table
Temp (°C) Temp (°F)
10 50
15 59
20 68
28 82.4
32 90
38 100
44 111
50 122
54 130
66 150
76 169

Dosing Pump (For 900/905 Models Only)

The dosing pump is located inside the
backsplash assembly on top cover. The dosing
pump will draw the right amount of detergent from
the bulk tank to the dispenser drawer where it will
mix with water and flows into tub assembly.
Bulging O-Ring
Resistance (Ω)
19,901
15,713
12,493
8,833
7,446
5,807
4,558
3,601
3,108
2,016
1,435
– 35 –
Dosing Pump Diagnosing
Verify dosing pump resistance is 1,744-ohms.
If the dosing pump resistance is out of range,
replace the dosing pump. If the dosing pump has
the proper resistance, run Service Mode Test
19: Bulk Detergent Dosing Pump Test to verify
dosing pump operation. If the dosing pump does
not operate during Service Mode test 19, test for
120 VAC at the dosing pump wiring connector.
If no voltage is present at the dosing pump
connector, verify voltage at J802, pin 1 to 6 on the
main board. If voltage is present at J802, check
the wiring from the main board to the dosing
pump for continuity.
Dosing Pump Removal
1. Remove backsplash assembly and main
board (see Backsplash Removal under
Control Panel Housing / Backsplash and
Main Board in the Cabinet and Structure
section of this guide). Remove the top cover
assembly (see Top Cover Removal under
Top Cover in the Capacitor (For 600/605
Models Only) section of this service guide).
2. The conduit can be removed by prying up
from top cover where it connects to the
dispenser box and slide to the right side of
washer to get disconnect from dosing pump.
Be sure the O-ring seal comes out as well.
3. Disconnect harness from pump.
Conduit
4. Remove the three hex-head screws which
is holding the pump to the top cover lift to
remove the dosing pump.
O-Ring
Screws
Dosing
pump