LG Dishwasher: drain hose obstruction
What is this symptom?
Experiencing standing water in your LG dishwasher after a cycle? This common issue is often caused by a drain hose obstruction, preventing wastewater from properly exiting the appliance. Addressing this problem promptly can help restore your dishwasher's function and efficiency.
Important Tips for LG Models
- Drain hose obstruction is a commonly acknowledged cause of non‑draining symptoms in LG dishwashers and is addressed in multiple LG repair guides.
- Proper hose routing with a high loop or air gap is important for all dishwashers to prevent backflow and obstruction issues.
Possible Causes
Clogged drain hose
How to Identify: Standing water remains in dishwasher at end of cycle; water not flowing out; visible kinks in the drain hose under sink or behind dishwasher.
Part: Drain hose
Kinked or improperly routed drain hose
How to Identify: Drain cycle doesn’t clear water; hose under sink or behind dishwasher shows sharp bends or loops restricting flow.
Part: Drain hose
Debris passed filter accumulating in drain hose
How to Identify: Food particles visible in hose or collected at hose inlet; filter cleaning doesn’t resolve standing water.
Part: Drain hose/filters
DIY Solutions
Clear drain hose blockage
- Turn off dishwasher power and water supply.
- Pull dishwasher out to access back and locate drain hose.
- Disconnect the hose from the drain pump and sink/garbage disposal connection.
- Inspect hose for debris; use a wet/dry vacuum or flush with warm water to remove obstruction.
- Reattach hose ensuring no kinks and secure clamps.
- Slide dishwasher back and restore power; run a short drain cycle to test.
Straighten or properly route drain hose
- Turn off dishwasher power.
- Access drain hose under sink or behind dishwasher.
- Check hose routing; ensure it follows high loop or air gap as recommended, without sharp bends.
- Adjust routing to eliminate kinks and re-secure hose.
- Restore power and test drain function.
Next step
Choose the next step for drain hose obstruction
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Drain Hose
Carries waste water from the drain pump to your home's standpipe or sink drain.
- Typical part-only price
- $15 - $30
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Dishwasher parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Dishwasher Cleaner and Descaler
Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Professional Repairs
Replace drain hose
Drain pump inspection/repair
When to Call a Professional
Preventive Maintenance
-
Clean filters and inspect drain hose: Debris buildup and potential hose obstruction
Frequency: monthly -
Check hose routing: Kinking and flow restrictions
Frequency: quarterly
Frequently Asked Questions
Why is my LG Dishwasher Drain hose obstruction?
How do I fix LG Dishwasher Drain hose obstruction myself?
How much does it cost to fix Drain hose obstruction?
When should I call a technician for Drain hose obstruction?
References & Sources
- LG Dishwashers Not Draining: Causes, Fixes Repair-Blog
Community Analytical Insights
Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions
Common Issues Reported by Users
- Kinked or bent drain hose obstructing water flow
- Clogged drain hose due to food debris or grease buildup
- Improper installation of the drain hose leading to backflow issues
User Suggested Solutions
-
Inspect the drain hose for kinks or bends. Straighten out any kinks and ensure the hose is properly positioned. Check for any signs of wear or damage.
-
Disconnect the drain hose and use a long brush or a garden hose to clear any clogs. Rinse the hose thoroughly with water before reattaching.
-
Check the installation of the drain hose. Ensure it is at the correct height and not submerged in water. Adjust as necessary to prevent backflow.
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
OE error code (Drain hose obstruction)
Switched the dishwasher drain hose to another attachment point on the sink without a garbage disposal.
Source: Reddit r/appliancerepair
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