Dishwasher Won't Completely Drain

Quick answer

Check the drain hose for clogs, clean the filter, and ensure the air gap is clear. If water remains after a cycle, the pump or drain valve may need attention.

Confirm the symptom

• Standing water in the bottom of the dishwasher after cycles
• Dishes feel wet or damp after a full cycle
• Gurgling or slow draining sounds during the cycle
• Water pooling near the dishwasher base

Tools and prep

• Screwdriver (flathead and Phillips)
• Plunger or wet/dry vacuum
• Bucket or towels
• Flashlight
• Needle-nose pliers
• Rubber gloves
• Dishwasher cleaner or vinegar
• Turn off power at the circuit breaker
• Shut off water supply to the dishwasher

Step-by-step troubleshooting

1. Inspect the Drain Hose
   Do: Locate the drain hose at the back of the dishwasher and check for kinks or clogs.
   Observe: Look for blockages or debris in the hose.
   Means: A clogged hose can prevent proper drainage.
   Next: Clean or replace the hose if necessary.
2. Clean the Dishwasher Filter
   Do: Remove the bottom filter and rinse it under running water to remove food particles.
   Observe: Check for buildup or damage to the filter.
   Means: A clogged filter restricts water flow.
   Next: Replace the filter if it's damaged or excessively worn.
3. Check the Air Gap
   Do: Inspect the air gap on the countertop (if installed) for clogs.
   Observe: Look for debris or standing water inside the air gap.
   Means: A blocked air gap can cause drainage issues.
   Next: Clean the air gap with a brush or pipe cleaner.
4. Test the Drain Pump
   Do: Listen for the drain pump during a cycle and check for unusual noises.
   Observe: A humming sound without water movement may indicate a faulty pump.
   Means: A malfunctioning pump can't push water out.
   Next: Test the pump with a multimeter or replace it if needed.
5. Examine the Drain Valve
   Do: Check the drain valve for debris or damage.
   Observe: A stuck or broken valve prevents water from draining.
   Means: The valve must open fully for proper drainage.
   Next: Clean the valve or replace it if damaged.
6. Run a Descaling Cycle
   Do: Use a dishwasher cleaner or a vinegar solution to run a descaling cycle.
   Observe: Check if water drains more efficiently after the cycle.
   Means: Mineral buildup can restrict drainage.
   Next: Repeat if necessary or proceed to professional help.

Common causes

Parts matching

Common parts needed to fix a dishwasher that won't completely drain:

• Drain hose
• Dishwasher filter
• Air gap assembly
• Drain pump
• Drain valve
• Descaling solution

Purchase OEM parts for compatibility and reliability.

When to call a professional

• Water continues to pool after cleaning all components
• You hear the pump running but no water drains
• You're unsure about electrical components or pump replacement
• Standing water causes a foul odor or mold growth
• The dishwasher is under warranty and DIY repairs might void it

FAQ

Related guides

• dishwasher not draining after cycle

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