Test 6 Heater Switch Test - Electric Type; Test 7 Gas Valve Test - Gas Type - LG DLEX3885 Series Service Manual

Test 6
Heater switch test - Electric Type
Others
Enter diagnostic mode and
press the START/PAUSE
button twice. Measure the
voltage between YL3- 3
(WH) and the YL wire on
the black tab relay. Is the
voltage 240 VAC?
YES
Disconnect the YL3, black tab
YL3
relay and white tab relay
connectors at the main PCB.
Measure the resistance between
YL3-3 (WH) and the YL wire on
the black tab relay connector. Is
the resistance 18-22 Ω ?
YES
Measure the resistance
between YL3-3 (WH) and
the BL wire on the white
tab relay connector. Is the
resistance 18-22 Ω ?
YES
Measure the resistance between
the YL wire on the black tab relay
and the BL wire on the white tab
relay connectors. Is the
resistance 36-44 Ω ?
YES
Measure the resistance
between terminals 1 (RD)
and the heater housing. Is
the resistance Ω ?
YES
Refer to the hi-limit thermostat and
thermal cut off component tests.
Only for CHECK VENT model
34
• Check power
supply.
NO
• Check wiring
and
connectors to
the element.
NO
• See element
component
test.
• Check wiring
and connectors
to the element.
NO
• See element
component
test.
• Check wiring
and connectors
to the element.
NO
• See element
component
test.
• Replace the
element.
NO
Wires
•L2(Red)
•L2D(White) : Go to the duct(YL3 in main
pcb)
•L2S(White) : Go to the safety.