Read LG 40311 Service Manual online
28
HEATING ERROR
Is displayed?
Check the connectors at the
main PCB, the heater and the
thermistor. Are the
connectors loose or
disconnected?
main PCB, the heater and the
thermistor. Are the
connectors loose or
disconnected?
Reconnect or
repair
the connector.
repair
the connector.
Yes
Yes
Check the resistance of the
heater. Is the resistance
between 12Ω and 18Ω ?
heater. Is the resistance
between 12Ω and 18Ω ?
(Refer to 9-6 Heater
assembly.)
assembly.)
Proceed to next step at right
Replace the
HEATER
ASSEMBLY.
HEATER
ASSEMBLY.
No
Yes
No
Wash heater
Is the connector connected to
thermistor disconnected or
disassembled?
thermistor disconnected or
disassembled?
Reconnect or
repair
the connector.
repair
the connector.
Yes
Check the thermistor
resistance. Is the resistance
correct according to the
chart?
resistance. Is the resistance
correct according to the
chart?
(Refer to 9-7 thermistor
assembly.)
assembly.)
Replace the
THERMISTOR
ASSEMBLY.
THERMISTOR
ASSEMBLY.
Yes
No
Are the thermistor terminals
dry and free of corrosion?
dry and free of corrosion?
[Note]
The temperature sensing circuits on the main
PCB are very simple, consisting only of resistors
and capacitors. Problems with wiring or
connections in the thermistor circuit are the
most likely cause for this error. Be sure to
check ALL connections and wiring thoroughly.
The main PCB should only be replaces as a last
resort, as it is unlikely to be the cause.
The temperature sensing circuits on the main
PCB are very simple, consisting only of resistors
and capacitors. Problems with wiring or
connections in the thermistor circuit are the
most likely cause for this error. Be sure to
check ALL connections and wiring thoroughly.
The main PCB should only be replaces as a last
resort, as it is unlikely to be the cause.
Replace the
THERMISTOR
ASSEMBLY.
THERMISTOR
ASSEMBLY.
Yes
No
Wash thermistor
Click on the first or last page to see other 40311 service manuals if exist.