Asko Dishwasher: not draining properly

Professional Repair Guide

What is this symptom?

Is your Asko dishwasher not draining properly? If water remains in the bottom after cycles, or if you notice bad odors, you're not alone. This common issue can stem from clogged filters, blocked drain hoses, or faulty drain pumps, leading to frustrating wash cycles and hygiene concerns.

Urgency: Medium

Important Tips for Asko Models

Asko dishwashers use strainer filters and sump designs specific to model lines; ensure removal and reinstallation per manual to avoid misalignment

Possible Causes

Clogged filter or strainer assembly

How to Identify: Water pooling in tub; visible food debris in filter area; may have smelly water at bottom

Part: Dishwasher filter/strainer

Blocked or kinked drain hose

How to Identify: Water remains after cycle; hose may be bent or obstructed behind unit; slow or no flow when flushing hose manually

Part: Drain hose

Faulty or obstructed drain pump

How to Identify: No humming or unusual grinding noises when pump attempts to drain; debris seen inside pump area on inspection; water stays after clearing filter and hose

Part: Drain pump and impeller

Air gap or high loop obstruction

How to Identify: Standing water even after cleaning filter and hose; block at sink air gap if installed

Part: Air gap / drain configuration

DIY Solutions

Clean the dishwasher filter/strainer

Easy 10-20 minutes

Tools Needed: gloves, soft brush

Turn off dishwasher power
Remove bottom rack and locate filter assembly at tub base
Twist and lift filter out; rinse under warm water
Use brush to remove debris; reassemble filter and rack
Run a short cycle to check drainage

⚠️ Safety First: Ensure power is off before reaching into dishwasher

Inspect and clear the drain hose

Moderate 20-40 minutes

Tools Needed: screwdriver, bucket, long flexible brush

Turn off power and water to dishwasher
Locate drain hose behind or under cabinet
Loosen clamp and disconnect hose (have bucket ready)
Flush hose with water and use brush to remove clogs
Straighten any kinks and reattach hose securely
Restore power and test drain

⚠️ Safety First: Be prepared for some water spill

Check and clear air gap/high loop

Easy 10 minutes

Tools Needed: screwdriver, toothpick or small brush

Locate air gap cap on sink or ensure drain hose high loop under counter
Remove air gap cover and clean internal chamber
Clear any debris and reassemble parts
Ensure hose forms a proper high loop and test dishwasher

Professional Repairs

Replace faulty drain pump

Estimated Cost: $100 - $250

Check internal drain valve or electrical faults

Estimated Cost: $150 - $350

When to Call a Professional

Drain pump makes unusual noises or does not run when commanded

Internal electrical faults (errors displayed) after basic checks

Persistent standing water after clearing filter and hose

Preventive Maintenance

Clean filter regularly: Filter blockages and drainage issues
Frequency: Monthly
Inspect drain hose position: Kinks or obstructions that hinder drainage
Frequency: Every 3-6 months

Frequently Asked Questions

Why is my Asko Dishwasher not draining properly?

Common causes include clogged filters, blocked drain hoses, or a faulty drain pump.

How do I fix Asko Dishwasher not draining properly myself?

Start by cleaning the filter, inspecting the drain hose, and checking the air gap for obstructions.

How much does it cost to fix not draining properly?

Professional repairs can range from $100 to $350 depending on the issue.

When should I call a technician for not draining properly?

If DIY solutions fail or the problem persists, it's best to consult a technician.

References & Sources

Dishwasher Not Draining Filter and Pump Troubleshooting Guide Community

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

Clogged drain filter or sump area
Faulty drain pump
Blocked drain hose

User Suggested Solutions

Check and clean the drain filter and sump area. Remove the bottom dish rack, unscrew the filter cover, and clean any debris. Reassemble and test the dishwasher.
Inspect the drain pump for blockages or failure. Access the pump by removing the lower spray arm and the cover. Clear any debris or replace the pump if necessary.
Check the drain hose for kinks or blockages. Ensure the hose is properly connected and not obstructed. Replace if damaged.