LG WDEP9421
✓ VERIFIEDWall oven2024
What We Know
The WDEP9421 is a 30-inch LG electric double wall oven. The headline is InstaView, knock twice to see inside. Sold in printproof stainless steel in 2024.
Status
Currently Sold
Years Sold
On sale in 2024
Capacity
4.7 + 4.7 cu ft (9.4 total)
Finishes
Printproof Stainless Steel (WDEP9421S)
Width
29.75 in
Height
52.06 in
Depth
23.38 in
Voltage
240 volts, 50 amperes and marked for use with ranges with closed-loop connecto
Amperage
40 A circuit
Power connection
Hardwired
Connected load
kW Rating at 240V 10.2 kW
Wi-Fi
Yes · ThinQ
Parts & Labor
1 year parts and labor
1 year internal/functional parts and labor
True Convection
PrintProof®
EasyClean®
Air Fry
Steam Sous Vide
WideView™ Window
SmartDiagnosis™
Hold your phone to the control panel and the app reads the fault code for you.
SmoothTouch®
ThinQ Care™
InstaView®
Knock twice on the door glass to light up the inside without opening it.
LG ThinQ®
ThinQ®
LG's app: start cycles, get alerts, and run diagnostics from your phone.
Recalls
None on file
verified Sep 2026
Written from the record's fields, not from reviews. Covers the WDEP9421 generation (WDEP9421S) only. A single year means the model was documented on sale that year; the full sales span was not established. Sources: LG spec sheet · LG warranty
Expected Lifespan
14–16 years
ApplianceEdge estimate · LG wall oven
Parts & Labor
1 year parts and labor
1 year internal/functional parts and labor
Spec Sheet
lg.com
Warranty Statement
lg.com
Expected lifespan is ApplianceEdge's estimate, formed from category lifetime data, service records and warranty terms. It is not a prediction for your unit and not a manufacturer figure — with proper care and maintenance, many appliances last well beyond this range. Everything else on this tab is written from the record's fields. Sources: LG spec sheet · LG warranty
What to Expect
LG runs its own factory service in most major metros, with authorized local servicers everywhere else. Genuine parts go through Encompass Parts Distribution and LG's own store, so independents can get them. Full warranty terms are in Owning It.
Recalls
None on file
verified Sep 2026
Known Issues
None on file
verified Sep 2026
Factory Service
lg.com
Authorized Servicers
lg.com
No code matches
Meaning
Sabbath Mode
What to do
Follow LG’s Clock-button Sabbath Mode steps; service if unresolved.
5b · Sb
Sabbath Mode
Follow LG’s Clock-button Sabbath Mode steps; service if unresolved.
Meaning
Object on button or press longer than nine seconds
What to do
Clean touch button and press Power; request inspection if unresponsive.
E · E1
Object on button or press longer than nine seconds
Clean touch button and press Power; request inspection if unresponsive.
Meaning
upper oven thermistor error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F1 · F2
upper oven thermistor error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
touchpad key sensor error
What to do
reset breaker for 30 seconds; service if persistent.
F3
touchpad key sensor error
reset breaker for 30 seconds; service if persistent.
Meaning
lower oven thermistor error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F4 · F5
lower oven thermistor error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
upper oven heating error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F6 · F9
upper oven heating error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
upper convection fan error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F7
upper convection fan error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
oven meat probe error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F8 · F18
oven meat probe error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
upper oven door lock error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F10
upper oven door lock error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
communication error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F11
communication error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
oven sensor error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F16
oven sensor error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
convection fan error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F17
convection fan error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
oven heating error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F19
oven heating error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
lower oven door lock error
What to do
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
F20
lower oven door lock error
Clear/Off and retry; reset breaker for 30 seconds; service if persistent.
Meaning
steam sensor error
What to do
reset breaker for 30 seconds; service if persistent.
F21 · F22 · F24 · F25
steam sensor error
reset breaker for 30 seconds; service if persistent.
Meaning
cooling fan error
What to do
reset breaker for 30 seconds; service if persistent.
F27
cooling fan error
reset breaker for 30 seconds; service if persistent.
Meaning
front induction temperature sensor error
What to do
reset breaker for 30 seconds; service if persistent.
F33 · F34
front induction temperature sensor error
reset breaker for 30 seconds; service if persistent.
Meaning
transistor error
What to do
reset breaker for 30 seconds; service if persistent.
F36
transistor error
reset breaker for 30 seconds; service if persistent.
Meaning
main board/inverter communication error
What to do
reset breaker for 30 seconds; service if persistent.
F38
main board/inverter communication error
reset breaker for 30 seconds; service if persistent.
Meaning
voltage error
What to do
reset breaker for 30 seconds; service if persistent.
F42
voltage error
reset breaker for 30 seconds; service if persistent.
Meaning
fan error
What to do
reset breaker for 30 seconds; service if persistent.
F45 · F46
fan error
reset breaker for 30 seconds; service if persistent.
Meaning
griddle sensor error
What to do
reset breaker for 30 seconds; service if persistent.
F51
griddle sensor error
reset breaker for 30 seconds; service if persistent.
Meaning
griddle sensor short error
What to do
reset breaker for 30 seconds; service if persistent.
F52
griddle sensor short error
reset breaker for 30 seconds; service if persistent.
Meaning
griddle heating error
What to do
reset breaker for 30 seconds; service if persistent.
F56 · F59
griddle heating error
reset breaker for 30 seconds; service if persistent.
Meaning
sous-vide temperature sensor error
What to do
reset breaker for 30 seconds; service if persistent.
F62
sous-vide temperature sensor error
reset breaker for 30 seconds; service if persistent.
Meaning
sous-vide heating error
What to do
reset breaker for 30 seconds; service if persistent.
F69
sous-vide heating error
reset breaker for 30 seconds; service if persistent.
Meaning
Surface hotter than 150°F
What to do
Let cool; reset if still displayed at room temperature; service if persistent.
H5
Surface hotter than 150°F
Let cool; reset if still displayed at room temperature; service if persistent.
Meaning
thermistor fault
What to do
Power On/Off; breaker reset 30 seconds; service if persistent.
LED pattern 1 (red segments) · LED pattern 2 (red segments) · LED pattern 3 (red segments)
thermistor fault
Power On/Off; breaker reset 30 seconds; service if persistent.
Meaning
prolonged water/metal contact
What to do
Remove objects/water; Power On/Off; breaker reset 30 seconds; service if persistent.
LED pattern 4 (red segments)
prolonged water/metal contact
Remove objects/water; Power On/Off; breaker reset 30 seconds; service if persistent.
Meaning
display error
What to do
Power On/Off; breaker reset 30 seconds; service if persistent.
LED pattern 5 (red segments)
display error
Power On/Off; breaker reset 30 seconds; service if persistent.
Meaning
low voltage
What to do
Contact a qualified electrician.
LED pattern 6 (red segments)
low voltage
Contact a qualified electrician.
Meaning
Power interrupted
What to do
Clear/Off; retry; breaker reset 30 seconds; service if persistent.
PF
Power interrupted
Clear/Off; retry; breaker reset 30 seconds; service if persistent.
Repair
What’s involved
DIY
Parts
Labor
Parts
Bake element
$50–$85
Bake-element terminal / connector
$20–$55
Relay board / bake-relay output
$175–$310
Labor
$150–$425
Oven will not heat or takes much longer than it used to
Bake element
$50–$85
Bake-element terminal / connector
$20–$55
Relay board / bake-relay output
$175–$310
$150–$425
Parts
Oven temperature sensor
$25–$75
Labor
$125–$250
Oven temperature is wrong or food cooks unevenly
Oven temperature sensor
$25–$75
$125–$250
Parts
Main control board
$110–$280
Relay board
$175–$310
User-interface / touch-control assembly
$175–$335
Labor
$250–$425
Display is dead, oven resets, or shows repeated error codes
Main control board
$110–$280
Relay board
$175–$310
User-interface / touch-control assembly
$175–$335
$250–$425
Parts
Convection fan motor assembly
$95–$115
Convection ring element
$120–$240
Labor
$250–$425
Convection fan is noisy, does not run, or baking is uneven
Convection fan motor assembly
$95–$115
Convection ring element
$120–$240
$250–$425
Parts
Broil element
$80–$105
Broil-element terminal / connector
$20–$55
Relay board / broil-relay output
$175–$310
Labor
$150–$425
Broiler does not heat or only part of it glows
Broil element
$80–$105
Broil-element terminal / connector
$20–$55
Relay board / broil-relay output
$175–$310
$150–$425
Parts
Door hinge / spring assembly
$60–$65
Hinge receiver / support
$15–$25
Band is per hinge. Hinges are usually replaced as a pair — plan for two.
Labor
$150–$425
Door will not close, drags, or falls open
Door hinge / spring assembly
$60–$65
Hinge receiver / support
$15–$25
Band is per hinge. Hinges are usually replaced as a pair — plan for two.
$150–$425
Parts
Door lock motor / switch assembly
$110–$180
Mechanical latch / linkage assembly
$60–$190
Labor
$150–$325
Oven is locked, will not unlock, or self-clean will not start
Door lock motor / switch assembly
$110–$180
Mechanical latch / linkage assembly
$60–$190
$150–$325
Parts
Thermal cutoff / thermal fuse
$20–$65
Cooling fan assembly
$80–$225
Cooling-fan control / main control board
$200–$300
Labor
$150–$425
Oven shuts off while cooking or the cooling fan keeps running
Thermal cutoff / thermal fuse
$20–$65
Cooling fan assembly
$80–$225
Cooling-fan control / main control board
$200–$300
$150–$425
Parts
Oven light bulb
$20–$50
Oven light socket / lamp holder
$10–$80
Oven door / light switch
$15–$80
Labor
$125–$325
Interior light does not work or the oven thinks the door is open
Oven light bulb
$20–$50
Oven light socket / lamp holder
$10–$80
Oven door / light switch
$15–$80
$125–$325
Parts
Inner door glass
$90–$95
Outer door glass
$220–$425
Oven door gasket / seal
$75–$95
Labor
$150–$425
Glass is cracked, shattered, or the door becomes dangerously hot
Inner door glass
$90–$95
Outer door glass
$220–$425
Oven door gasket / seal
$75–$95
$150–$425
Easy DIY: basic tools, under an hour. Moderate: some disassembly. Advanced: experience with the machine's internals. Technician: sealed-system, electrical or tub-split work.
Parts prices don’t move much across the country; labor does. If a technician supplies the part, expect 40–50% on top of the part price.
Error codes and known issues come from manufacturer documents and public records, not from reviews. Sources: LG product page
Data You Can Trust
This page draws on the ApplianceEdge Registry — 2,600 appliance families connected to more than 9,400 verified models, independently researched. We don’t know everything about this family yet, and we won’t pretend to: finish records and filter and accessory cross-references for this platform are still being verified. We only publish what we can stand behind, and the gaps close as the Registry grows.
ApplianceEdge assessments — lifespans, repair values, and reliability notes — are our editorial opinions, built from documented third-party sources: owner reports, industry pricing data, manufacturer literature, and official records. They describe patterns across a product family, not any individual machine; your experience may differ. Recall information links directly to official CPSC notices. We accept no payment from manufacturers, and no brand influences what we publish.