LG RC7055*P*Z, Service Manual

Page: 27 / 55

DIAGNOSTIC TEST
10
Test 4 Heater check
Trouble Symptom : Heater is not working. Drying failure. The designated
temperature is not reached.
Measurement condition : Power cord is unplugged.
1. Check if Lint filter is
damaged or clogged.
2. Check if condensing unit
is clogged or not.
Trouble Symptom : Motor malfunction, ventilation error
Heater On/Off occurs
frequently
1
• Check and replace
controller.
• See page 17, PCB
assembly lay-out.
• Check harness &
connection
• Check the resistance of thermostat
to heater.
Is it less than 1
Ω ?
• Replace Heater
• Check harness &
connection
Manually reset thermostat
(Press button ).
And check resistance thermostat.
• Check the heater resistance.
1) Yellow tab relay violet wire ~
White tab relay yellow wire :
50
Ω
?
2) White connector 2wire : 50 Ω ?
( See photo on the left )
27