Test 2 Thermistor Test - LG CDE3379WD Service Manual

Test 2
Thermistor Test --- Measure with Power Off
WARNING
!
• Before measuring resistance, be sure to turn power off, and do voltage discharge. (When discharging,
contact the metal plug of power cord with the ground.)
• Failure to follow these instructions can result in death or electrical shock.
Trouble Symptom
Measurement Condition
Take the 6 pin Connector
from the Controller.
Table 1. Resistance for Thermistor Temperature.
Air TEMP. °F(°C)
50°F (10°C)
60°F (16°C)
70°F (21°C)
80°F (27°C)
① During Diagnostic Test, tE1 and tE2 error occur.
② During operation, Heater would not turn off or remains on.
③ Difference between actual and sensed temperature is significant.
After turning power off, measure the resistance.
Short with metal to the 6-pin connector's
Pin ② (Blue Wire) and
Pin ④ (Orange Wire) to Controller.
Check if resistance is in the range of Table 1
when measuring resistance between
terminals after separating harness
from thermistor assembly connector.
Check harness-linking connector.
RES. kΩ Air TEMP. °F(°C)
18.0 90°F (32°C)
14.2 100°F (38°C)
11.7 110°F (43°C)
9.3 120°F (49°C)
NO
YES
RES. kΩ
7.7
6.2
5.2
4.3
40
• Check if control
and the 6-pin
connector are
YES
properly
connected.
• Replace
controller.
• Replace
NO
thermistor.
Air TEMP. °F(°C) RES. kΩ
130°F (54°C)
140°F (60°C)
150°F (66°C)
160°F (71°C)
2.9
3.0
2.5
2.2