What does Samsung Dishwasher Not Cleaning Dishes - Causes & Fix mean?

A clogged filter recirculating food particles is the most common cause. Remove and clean the filter assembly under warm water to restore cleaning performance.

How do I fix Samsung Dishwasher Not Cleaning Dishes - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Samsung Dishwasher Not Cleaning Dishes - Causes & Fix?

The most frequently replaced parts for Samsung Dishwasher Not Cleaning Dishes - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Samsung Dishwasher Not Cleaning Dishes - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Samsung Dishwasher Not Cleaning Dishes - Causes & Fix

Samsung Dishwasher Not Cleaning Dishes — What’s Happening

When your Samsung dishwasher doesn’t clean well, the cycle completes but dishes come out dirty, greasy, or covered in food particles. This is a performance symptom with multiple possible causes, not a single fault code. Samsung ties poor cleaning to water delivery problems, clogged filters or spray arms, detergent dispenser issues, improper loading, and water quality. In some cases, dirty water can recirculate if the drain hose lacks a proper high loop to prevent backflow from the drainpipe.

Jump to Fix

Most Likely Causes

Clogged filter assembly Food debris trapped in the filter recirculates onto dishes during the wash cycle instead of draining away.
Clogged spray arm nozzles Mineral deposits or food particles block the jets in the middle or lower spray arms, reducing water coverage on dishes.
Detergent dispenser malfunction A clogged spring, damaged door, or sticky dispenser prevents detergent from releasing properly during the cycle.
Low water supply pressure Insufficient water pressure or a partially closed supply valve limits the amount of water entering the dishwasher.
Improper loading or overloading Dishes packed too tightly or positioned incorrectly block spray arms and prevent water and detergent from reaching all surfaces.
Hard water or mineral buildup Mineral deposits reduce cleaning performance and can clog components over time if the water softener salt is not refilled.
Drain hose backflow A drain hose installed without a high loop allows dirty water to siphon back into the dishwasher and contaminate clean dishes.

How to Diagnose and Fix

Confirm that detergent and rinse aid are loaded and that an appropriate wash cycle was selected for the soil level.
Check that the water supply valve under the sink is fully open and verify adequate supply pressure (Samsung specifies 20 PSI to 120 PSI).
Remove and clean the filter assembly by rinsing it under warm water and scrubbing away debris with a soft brush, then replace if damaged.
Remove the middle spray arm by holding the nut and rotating clockwise, and pull the lower spray arm straight up to remove it, then wash both in warm soapy water and clear clogged jets with a soft brush or toothpick.
Inspect the detergent dispenser for clogs or damage, clean the spring and door with a small brush, and replace the dispenser if the spring or door is broken.
Check the drain hose installation and confirm it has a proper high loop to prevent backflow of dirty water from the drainpipe.
If hard water is present and your model uses a softener, refill dishwasher salt and adjust regeneration settings per the user manual.
Run a test cycle with properly loaded dishes after cleaning and corrections to verify improved performance.

Parts You Might Need

Part	Notes
Filter assembly	Amazon \| Replace if the screen is torn or the plastic housing is cracked.
Spray arm (middle or lower)	Amazon \| Replace if jets are damaged or the arm is cracked and cannot spin freely.
Detergent dispenser	Amazon \| Replace if the spring is broken or the door latch is damaged and detergent does not release.
Water inlet valve	Amazon \| Replace if the dishwasher is not filling with enough water despite adequate supply pressure.

If your appliance also shows a code on the display, these match this problem:

When to Call a Pro

Call a technician if cleaning and maintenance steps do not restore performance, if the water inlet valve needs replacement, or if you suspect an internal circulation pump or wash motor issue. A pro can test water flow rates, measure inlet valve function, and diagnose electronic control problems that affect wash cycle performance. If your dishwasher is still under warranty, contact Samsung support before attempting component replacement.