Samsung Dishwasher Error Code PC — What It Means & How to Fix It

What Does This Error Mean?

The PC error on a Samsung dishwasher stands for 'Pump Check' — the control board detected an issue with the circulation pump motor. The circulation pump is what pushes water through the spray arms to wash your dishes. If this pump runs too slowly or draws too little current, the PC code appears. Sometimes the code clears on its own after a reset. If it persists, the pump or its control circuit needs inspection.

Affected Models

Samsung DW80R9950UG
Samsung DW80R5061US
Samsung DW80K5050US
Samsung DW7933LRASR
Samsung DW80F600UTW

Common Causes

Debris or a food particle lodged in the circulation pump impeller slowing it down
Air trapped in the pump causing a pump check failure at startup
Failing circulation pump motor drawing low current as it wears out
Blocked filter assembly restricting water flow to the pump
Wiring fault or loose connector at the circulation pump motor

How to Fix It

Cancel the cycle and perform a hard reset. Turn off the dishwasher at the power button, then unplug it from the outlet or flip the dedicated circuit breaker. Wait 5 minutes, then restore power. This clears any temporary control board errors.

A simple power reset fixes many intermittent PC errors caused by air lock or temporary pump hesitation.
Clean the dishwasher filter assembly — this is the most important maintenance step. Remove the lower spray arm, then lift out the cylindrical mesh filter and the flat coarse filter beneath it. Rinse both thoroughly under hot running water and use a soft brush to clear any buildup.

Samsung recommends cleaning the filter at least once a month. A clogged filter starves the pump of water, causing it to cavitate and trigger the PC check.
Check the spray arms for blocked holes. Mineral deposits and food particles can clog the small holes, increasing back-pressure on the pump. Remove each spray arm (they usually unscrew counterclockwise) and rinse them under the tap, poking a toothpick through any blocked holes.

Running the dishwasher with blocked spray arms makes the pump work much harder and can trigger circulation-related error codes.
After cleaning, add water directly to the bottom of the tub (about 2 cups) before restarting. This helps prime the pump if air got trapped inside. Then run a short rinse cycle to verify the pump starts correctly.

Pumps can sometimes air-lock after a long period of non-use. Manual priming with water before the first cycle solves this.
If the PC error returns after cleaning and priming, the circulation pump motor is likely failing. Listen for the pump during the wash phase — a struggling pump makes a humming or grinding noise instead of the usual steady rush of water sound. A technician will need to test and replace the pump.

When scheduling service, mention the PC error code specifically — it helps the technician know to check the circulation pump circuit.

When to Call a Professional

If cleaning the filter and resetting the machine don't fix the PC error, the circulation pump likely needs replacement. Pump replacement on Samsung dishwashers costs $150-$350 including parts and labor. A technician can quickly verify whether it's the pump or the wiring circuit by measuring pump motor resistance.

Frequently Asked Questions

What does the circulation pump do in a dishwasher?

The circulation pump is the heart of your dishwasher's cleaning system. It takes water from the bottom of the tub and pumps it up through the spray arms at high pressure. The spray arms rotate as the water shoots through their holes, spraying your dishes from all angles. Without a working circulation pump, the dishwasher can fill with water but can't wash anything.

How do I know if my dishes are being washed without the circulation pump working?

If the circulation pump isn't running, your dishes will come out dirty — water will fill the tub but won't spray. You can tell during a cycle by opening the door slightly and listening — you should hear water rushing and spraying. If you only hear a quiet hum or nothing, the circulation pump is not operating correctly.

How long should a Samsung dishwasher circulation pump last?

A good quality dishwasher circulation pump should last 10-15 years with proper maintenance. The biggest killer of dishwasher pumps is running with a clogged filter — it causes the pump to overheat and wear out faster. Cleaning the filter monthly dramatically extends pump life. Hard water mineral buildup is the second leading cause of early pump failure.