LG WT7700HVA Service Manual page 38

PRESSURE SENSOR ERROR
Is PE displayed?
Yes
Is the connector connected to
pressure sensor disconnected
or disassembled?
No
Is the resistance of the
pressure sensor out of range?
(pin 1~ pin 3)
(21~23 Ω±10%)
No
Is the AIR CHAMBER and the
tube clogged?
No
Replace the MAIN PCB
assembly
Reconnect or
Yes
repair the
connector
Replace the
Yes
pressure switch
Fix the air
Yes
chamber and
remove the foreign
material
38