Trouble Shooting - LG LRE3085ST Service Manual

PROBLEMS
Oven not operating.
Oven element does not
heat.
Surface element barely heats
Surface element will not heat
Higher than low-medium
Frequent cycling of surface
Element or warming zone
"HS" (Hot surface)Warning
message does not light up
Oven light fails to operate.
Oven does not begin clean
cycle
Oven stop for Self clean
cycle

TROUBLE SHOOTING

POSSIBLE CAUSES & FAULTS
• Bad main PCB
• Power outage
• No line voltage
• Loose or bad wiring.
• Defective element.
• Bad main PCB or relay PCB
• Loose or bad wiring connection at
element or terminal block.
• Defective Surface units control
PCB
• Defective Surface element.
• Low line voltage
• This is normal
• Defective main PCB
• Failed oven lamp.
• Circuit breaker or fuse is open
• Loose or bad wiring
• Defective light socket.
• Defective door switch
• Bad wiring
• Bad latch system
• Programming error
• Defective a point of contact with
door switch
11-1
SOLUTIONS
• Test and/or replace PCB
➞ Refer to the page 9-1~9-3
• Verify power is present at unit.
• Verify that the circuit breaker is not
tripped
• Replace household fuse capacity
• Check circuit breaker.
• Repair or replace wiring
(see wiring diagrams).
• Test and/or replace element.
• Test and/or replace PCB
• Verify all connections are clean and tight,
replace broken wires
• Test and/or replace main PCB
• Test and/or replace element.
• Line voltage should be minimum
240-volts. Of necessary, electrician should
repair cause for low line voltage
• The element will cycle on and off to
maintain the heat setting
• Test and/or replace main PCB
• Check lamp and Replace is necessary
• Check circuit breaker or replace fuse.
• Repair or replace wiring
• Check light socket for continuity.
• Test and/or replace door switch
• Repair or replace wiring
• Check door locking motor and micro
switch
• Shut off power to oven for five minutes by
switching off circuit breaker.
Reset circuit breaker and try oven again.
• Test door switch and check the point of
contact between door and door switch