LG dishwashers display specific error codes when something goes wrong. Understanding these codes can save you time and help you decide whether it's a DIY fix or time to call a professional. This comprehensive guide covers every LG dishwasher error code, what causes each one, and exactly how to resolve it.
At Nika Appliance Repair, we've diagnosed over 2,400 LG dishwashers across Toronto since 2017. Our technicians are LG-certified and keep common replacement parts on hand. Let's decode those error messages together.
Understanding LG Dishwasher Diagnostics
The Self-Diagnosis System
LG dishwashers feature an advanced self-diagnosis system that continuously monitors multiple sensors throughout each wash cycle. Unlike older dishwashers that simply stopped working when problems occurred, modern LG units identify the specific component causing issues and communicate this through alphanumeric error codes on the display panel.
The main control board acts as the central processing unit, receiving input from up to eight different sensors: water level, temperature, turbidity (soil level), leak detection, door position, motor current, and water flow rate. When any sensor reading falls outside normal parameters, the control board halts the cycle and displays the corresponding error code.
LG ThinQ Smart Diagnosis
Many LG dishwashers manufactured after 2018 include ThinQ connectivity, which provides an additional diagnostic method. Using the LG ThinQ smartphone app, you can initiate Smart Diagnosis, which transmits operational data through audio tones to LG's service center. Within seconds, you receive a detailed diagnosis that goes beyond simple error codes.
To use Smart Diagnosis on your LG dishwasher:
- Open the LG ThinQ app on your smartphone
- Navigate to your registered dishwasher
- Select "Smart Diagnosis"
- Hold your phone near the dishwasher's speaker
- Press the Power button on your dishwasher 3 times within 10 seconds
- Wait for the diagnostic tones to complete (about 6 seconds)
The app will display which components are functioning normally and which require attention, often providing more specific information than the error code alone.
Error Code History and Memory
LG dishwashers store the last several error codes in memory, which helps technicians identify intermittent problems. Even if you've cleared an error by resetting the unit, a trained technician can access this history through service mode. This feature proves particularly valuable for diagnosing issues that only occur during specific cycle stages or under certain conditions.
LG Dishwasher Error Code Directory
AE Error - Leak Detected
The AE code means water has reached the base pan sensor. This is LG's flood protection system.
- Door seal damage: Check rubber gasket for cracks or debris
- Spray arm crack: Pressurized water can escape through damaged arms
- Tub perforation: Rare but serious - requires professional assessment
- Pump seal failure: Internal leak at the wash pump
OE Error - Drain Failure
Your LG can't evacuate water within the expected timeframe.
- Filter blockage: Food particles clogging the cylindrical filter
- Drain hose kink: Flexible hose compressed behind the unit
- Garbage disposal knockout plug: New installations often miss this step
- Drain pump motor failure: Motor windings can burn out after 5-7 years
IE Error - Fill Timeout
The dishwasher isn't receiving water fast enough.
- Supply valve closed: Check under-sink shutoff is fully open
- Inlet valve screen clogged: Toronto's hard water deposits minerals here
- Water inlet valve failure: Solenoid no longer opens properly
- Low water pressure: Below 20 PSI causes fill timeouts
HE Error - Heater Malfunction
Water isn't reaching proper temperature for sanitization.
- Heating element burnout: Common after 6-8 years of use
- Thermistor fault: Temperature sensor sending wrong readings
- Control board relay: Board can't activate the heater circuit
FE Error - Motor Problem
The wash motor or circulation system has failed.
- Motor overload: Debris jamming the impeller causes overheating
- Capacitor failure: Motor won't start without working capacitor
- Wiring harness damage: Connections corroded by moisture
Safe DIY Solutions for LG Error Codes
Clearing AE (Leak) Error
- Power off and unplug the dishwasher
- Pull unit forward carefully to access the base
- Use towels to absorb any pooled water in the base pan
- Inspect door gasket for food debris or damage
- Check spray arm connections for looseness
- Let base pan dry completely (use fan if needed)
- Restore power and run test cycle
Resolving OE (Drain) Error
- Remove lower rack and access cylindrical filter
- Twist filter counterclockwise and lift out
- Rinse under hot water, scrubbing with soft brush
- Check filter cavity for debris, remove with paper towel
- Inspect drain hose under sink for kinks
- If connected to garbage disposal, verify knockout removed
- Reinstall filter and run Rinse cycle
Fixing IE (Fill) Error
- Confirm hot water supply valve fully open under sink
- Turn off water and disconnect supply line from dishwasher
- Check inlet screen for mineral buildup (mesh filter at valve)
- Clean screen with vinegar soak or replace if damaged
- Reconnect supply line and restore water
- Run hot water at kitchen sink first, then start dishwasher
⚠️ When to Stop DIY
If you've tried these steps and the error persists, or if you see HE or FE codes, professional diagnosis is needed. These involve electrical components that require specialized testing equipment and safety training.
Need Professional Help with LG Dishwasher Repair?
Our certified technicians are available for same-day service across Toronto and the GTA!
Call (437) 747-6737LG Dishwasher Repair Costs in Toronto
| Error Code / Repair | Cost Range | Repair Time |
|---|---|---|
| OE - Drain Pump | $195-$285 | 45-60 min |
| IE - Inlet Valve | $155-$225 | 30-45 min |
| HE - Heating Element | $185-$265 | 60-90 min |
| AE - Door Seal | $140-$210 | 45-60 min |
| FE - Wash Motor | $280-$380 | 90-120 min |
| Control Board | $265-$395 | 60-90 min |
All repairs include our $95 diagnostic fee (waived with repair) plus 90-day parts and labor warranty.
When to Call a Professional
While some dishwasher issues can be resolved with DIY troubleshooting, certain situations require professional expertise:
- Electrical problems: Any repair involving wiring, control boards, or high-voltage components
- Gas appliance issues: All repairs on gas appliances should be done by licensed technicians
- Refrigerant systems: Sealed system repairs require EPA certification
- Persistent problems: Issues that return after DIY attempts indicate deeper problems
- Under warranty: DIY repairs can void manufacturer coverage
- Water damage risk: Leak repairs need proper diagnosis to prevent flood damage
Why Choose Nika Appliance Repair
- Same-Day Service: We understand appliance emergencies can't wait
- Certified Technicians: Factory-trained on all major brands
- Transparent Pricing: Upfront quotes with no hidden fees
- 90-Day Warranty: All repairs backed by comprehensive warranty
- Parts in Stock: Common parts on trucks for first-visit repairs
- Serving All Toronto: From Downtown to North York, Scarborough to Etobicoke
Areas We Serve
We provide expert LG dishwasher repair throughout the Greater Toronto Area:
- Downtown Toronto
- North York
- Scarborough
- Etobicoke
- Mississauga
- Brampton
- Vaughan
- Richmond Hill
- Markham
- Oakville
Frequently Asked Questions
Why does my LG dishwasher keep showing AE error after drying the base?
The float switch in the base pan may be stuck. Remove the base access panel, locate the white float mechanism, and ensure it moves freely up and down. If it's stuck in the up position, it continuously signals a leak even when dry.
My LG shows OE but water seems to drain - what's wrong?
The drain cycle has a specific time limit. If water drains slowly due to partial blockage, the dishwasher times out and shows OE. Check for buildup in the drain hose connection at the garbage disposal or air gap.
How do I find my LG dishwasher model number for parts?
Open the door and look on the left side panel frame - there's a silver sticker with model and serial numbers. You can also find it in the LG ThinQ app if your unit is connected. Model numbers start with LDF, LDT, or LDP.
Can I run my LG dishwasher with an active error code?
It's not recommended. Error codes indicate protective shutdowns. Running cycles with active errors can cause additional damage. Clear the error first, or have a technician diagnose before continued use.
Are LG dishwasher error codes the same across all models?
Yes, LG uses consistent error codes across their dishwasher lineup. Whether you have a front-control or top-control model, AE means leak, OE means drain issue, IE means fill problem, and so on.
Preventing LG Dishwasher Error Codes
Monthly Maintenance Tasks
Regular maintenance significantly reduces error code occurrences. Toronto's hard water (124-140 mg/L) accelerates mineral buildup, making these tasks essential for LG dishwasher owners in the GTA.
- Clean the filter assembly: Remove the cylindrical filter and flat filter, scrub with a soft brush under hot water
- Inspect spray arms: Remove and clear any debris from spray holes using a toothpick
- Run a cleaning cycle: Use LG-approved dishwasher cleaner or white vinegar in an empty hot cycle
- Wipe door seals: Food debris in gaskets causes AE errors and odors
Quarterly Deep Cleaning
Every three months, perform a more thorough inspection to catch developing problems before they trigger error codes:
- Check the drain hose for kinks or buildup
- Inspect the inlet valve screen for mineral deposits
- Clean the interior tub walls with baking soda paste
- Verify the float switch moves freely (prevents false AE codes)
Toronto-Specific Recommendations
Living in the Toronto area presents unique challenges for dishwasher maintenance. Municipal water hardness varies by neighbourhood, with areas like Scarborough and North York experiencing higher mineral content. Consider installing a water softener or using rinse aid with each cycle to combat scale buildup on heating elements and spray arms—the leading cause of HE and cleaning performance issues in our service area.
Get Your LG Dishwasher Fixed Today
Don't let LG dishwasher error codes disrupt your daily routine. Whether you need a quick diagnosis or a complete repair, Nika Appliance Repair is here to help. Our experienced technicians provide honest assessments, transparent pricing, and quality repairs backed by our 90-day warranty.
Schedule Your Repair Today
Same-day service available. Call now for expert LG dishwasher repair!
Call (437) 747-6737