LG dishwasher error code 13 typically indicates a water supply or drainage communication issue, which you can often resolve by checking inlet hoses and cleaning filters.
Table of Contents
- What does error code 13 mean on an LG dishwasher?
- Why does my LG dishwasher display error code 13?
- What are the quick fixes to try first for error code 13?
- What advanced steps should I take if the error persists?
- Which quick fix matches your specific symptom?
- When should I stop troubleshooting and call a professional?
- What information should I have ready before calling support?
- How can I prevent error code 13 from coming back?
What does error code 13 mean on an LG dishwasher?
LG dishwasher error code 13 typically points to a drainage obstruction or an issue with water flow during the cycle.
When your appliance detects an abnormality in how water enters or leaves the tub, it triggers this specific fault. Because exact error meanings can occasionally vary by specific model line or manufacturing year, always verify your user manual or manufacturer support page.
- The control board detects unexpected water levels or drainage failures.
- Error meanings can vary slightly across different LG dishwasher series.
- Checking your owner manual helps confirm exact model definitions.
- This code stops the cycle to prevent potential flooding or motor damage.
- Resolving flow obstructions usually clears the code immediately.
Why does my LG dishwasher display error code 13?
This error usually happens due to a kinked drain hose, a clogged filter, or a blocked garbage disposal connection.
Everyday use leads to food debris buildup and hose restrictions that disrupt normal water movement. Identifying the exact physical blockage helps you target the repair effectively and prevents recurring appliance faults.
- Food particles accumulate in the primary tub filter over time.
- The flexible drain hose may be pinched behind the dishwasher cabinet.
- A blocked knockout plug in the garbage disposal restricts wastewater flow.
- Low household water supply pressure can also trigger flow-related faults.
- Faulty internal pumps or sensors occasionally cause false error triggers.
What are the quick fixes to try first for error code 13?
You can resolve many common water flow issues by performing a simple power reset and inspecting the drainage path.
Always unplug the appliance or turn off the circuit breaker before touching internal components to ensure personal safety. Start with the easiest, safest troubleshooting steps before attempting any mechanical disassembly.
- Unplug the dishwasher or switch off the dedicated circuit breaker.
- Wait for five full minutes to let the control board reset.
- Inspect the flexible drain hose behind the unit for sharp bends or kinks.
- Check under the sink to ensure the garbage disposal knockout plug is open.
- Plug the dishwasher back in and run a short test cycle.
What advanced steps should I take if the error persists?
If initial checks fail, you should clean the internal sump filter and inspect the check valve for blockages.
Debris deep within the filtration assembly can block water from exiting the basin during heavy wash cycles. Follow these systematic steps carefully to clean out trapped residue without damaging plastic parts.
- Unplug the dishwasher or turn off power at the breaker box.
- Open the lower door and remove the bottom dish rack for clear access.
- Twist and lift out the cylindrical mesh filter assembly from the tub floor.
- Wash the filter components thoroughly under warm running water with a soft brush.
- Reinstall the filter assembly securely and restore power to test the unit.
Which quick fix matches your specific symptom?
Use this reference table to match your dishwasher behavior with the most likely cause and recommended fix.
Different symptoms point to distinct mechanical or installation issues that require targeted troubleshooting actions. Review the table below to quickly identify the best corrective measure for your situation.
| Symptom | Likely cause / fix |
|---|---|
| Standing water in bottom | Clogged filter / Clean mesh filter assembly |
| Hose vibrating loudly | Kinked hose / Straighten drain line |
| Error appears mid-cycle | Disposal blocked / Clear disposal inlet |
| Code returns instantly | Control glitch / Perform power reset |
When should I stop troubleshooting and call a professional?
You should call a qualified technician if electrical component testing, internal pump replacement, or sealed system work is required.
Attempting advanced electrical repairs on high-voltage control boards or internal pumps without proper training can cause injury or permanent appliance damage. Knowing your limits protects both your safety and your warranty coverage.
- Stop immediately if you smell burning or notice damaged internal wiring.
- Call support if the drain pump motor hums but fails to move water.
- Reach out to a professional when resetting and cleaning filters do not work.
- Avoid attempting live voltage testing on control boards without proper tools.
- Consult a technician if your appliance is still covered under active warranty.
What information should I have ready before calling support?
Gather your exact appliance model number, serial number, warranty details, and a summary of troubleshooting steps tried.
Having accurate product information ready helps customer service agents diagnose your issue faster and dispatch the correct replacement parts if necessary. You can typically find the model and serial number on a metal sticker along the tub rim.
- Locate the full model and serial number on the dishwasher door frame.
- Check your purchase date and review active warranty documentation terms.
- Write down the exact error code number displayed on the control panel.
- List all the troubleshooting steps and resets you have already performed.
- Note any unusual noises or smells observed during recent wash cycles.
How can I prevent error code 13 from coming back?
You can prevent future error code 13 occurrences by scraping dishes thoroughly and running monthly cleaning cycles.
Regular preventive maintenance stops grease and food particles from accumulating in hoses and filters over time. Implementing these simple housekeeping habits keeps your dishwasher running efficiently year-round.
- Scrape large food scraps off plates before loading them into racks.
- Clean the bottom tub filter mesh at least once every single month.
- Run a dedicated monthly cleaning cycle with dishwasher cleaner or white vinegar.
- Inspect the under-sink drain hose periodically for accidental pinches.
- Avoid overloading racks to ensure proper water circulation and drainage.
Frequently Asked Questions
What should I do if error code 13 appears immediately after a brand-new installation?
If this code appears on a brand-new installation, the most common culprit is a forgotten knockout plug inside the garbage disposal inlet. Ensure the plastic plug was completely removed where the dishwasher drain hose connects to the disposal. Also verify that the drain hose features a high loop to prevent backflow.
Can a clogged garbage disposal cause my LG dishwasher to show an error code?
Yes, a clogged or improperly installed garbage disposal frequently prevents a dishwasher from draining wastewater correctly. Because dishwasher drain hoses typically empty directly into the disposal inlet, any blockage there backs up water into the machine and triggers error codes. Clean out your disposal thoroughly before troubleshooting the dishwasher further.
Will resetting my circuit breaker permanently clear error code 13?
circuit breaker reset clears temporary software glitches on the main control board, but it will not fix a physical blockage. If a kinked hose, dirty filter, or failing pump caused the issue, the error code will return as soon as you start a new cycle. Always address physical obstructions alongside performing power resets.
How often should I clean the drain filter on my LG dishwasher?
You should inspect and clean your LG dishwasher drain filter at least once a month to prevent debris buildup. Homes with heavy usage or households that rinse dishes less thoroughly may require bi-weekly filter maintenance. Regular cleaning prevents slow drainage and keeps error codes from interrupting your wash cycles.
Is repair covered under warranty if error code 13 is caused by a failing pump?
Most manufacturer warranties cover internal mechanical failures like a defective drain pump during the initial one-year purchase window. However, service calls resulting from external installation errors, customer misuse, or clogged filters are typically not covered. Review your specific warranty booklet or contact manufacturer support to confirm coverage details.
Bottom Line
Unplug your dishwasher and inspect the drain hose for kinks as your very first step. Keeping your filters clean will prevent most water flow errors from returning.
Sources
- LG Support
- LG Owner’s Manual
- Manufacturer Support Page
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