LG TD-C70040E Service Manual page 25

DIAGOSTIC TEST
11
Test 4 Heater check
Trouble Symptom : Heater is not working. Drying failure. The designated
Measurement condition :
WH3
1 2 3
Heater On/Off occurs
frequently
temperature is not reached.
Power cord is unplugged.
With WH3,RD3 disconnected
RD3
from Controller,
WH3
ranges 26Ω~32Ω ?
1 2 3
WH3
ranges 53Ω~59Ω ?
When check thermostat to
Heater,
it is less than 1Ω?
Manually get Thermostat
back (Press button )
1. Clean Condensing unit :
2. Check if Lint filter is
damaged or clogged
Trouble Symptom : Motor malfunction, ventilation error
- RD3 resistance
- RD3 resistance
NO
NO
24
• Check and replace
controller.
YES
• Relay RTY2, RTY3
• See page 15, PCB
assembly lay-out.
• Replace Heater
• Check Harness
YES
connection