Water Outlet (Backup Heater) Temperature Sensor Error (E903) - Samsung AE090JXYDEH Service Manual

Troubleshooting

4-3-5 Water outlet (backup heater) temperature sensor error (E903)

1. Check procedure
Is the thermistor (backup heater)
connected to CONTROL KIT PBA?
Measure the resistance between
the B/W two terminals.
Does the measured resistance
accord with the value in the table
on the right side?
Replace the PBA and reset the power.
62
Yes
Yes
No
Connect the thermistor to the T3 on the
CONTROL KIT and reset the power.
Resistance is about 10.93 kΩ at 26°C.
Replace the thermistor.
Temperature
(°C)
70
60
50
40
30
21
10
0
No
-10
Samsung Electronics
Resistance
(KΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0