Samsung Dishwasher Not Draining? Error Codes & Fixes

Why is my Samsung dishwasher not draining?

Samsung dishwashers use a different drain monitoring system than other major brands — Samsung uses sensors to detect drain water levels and throws specific error codes when something’s wrong. When a Samsung dishwasher won’t drain, the cause is typically:

1. Error code 5C, SC, or 5E — drain error from sensor
2. Error code OC, oC, or 0C — overflow / drain blockage
3. Clogged filter at the bottom of the tub
4. Drain hose kinked or improperly mounted (no high loop)
5. Drain pump impeller jammed with debris
6. Drain pump motor failure

Samsung dishwashers are common in newer Tampa Bay builds, especially in Wesley Chapel, Westchase, and South Tampa renovations done in the last 5-8 years. Perfect Appliance Repair Tampa knows Samsung error codes and the ThinQ Smart Diagnosis system.

Samsung dishwasher error codes for drain failures

5C, SC, or 5E — drain error

The most common Samsung dishwasher drain error code. Samsung’s drain sensor detects that water isn’t dropping at the expected rate during the drain cycle and throws this code. Causes are the same as any drain failure: clogged filter, kinked hose, jammed impeller, or pump failure. The 5C code itself doesn’t tell you which — work through troubleshooting in order.

OC, oC, or 0C — overflow / drain blockage

OC indicates Samsung detected water overflow at the base of the unit. Usually means the drain failed during a wash cycle and water backed up into the safety pan. Don’t keep running the dishwasher — pull the toe kick and check for water under the unit. The cause is upstream: a complete drain blockage (filter, hose, pump). Fix the drain issue first, then dry out the safety pan before restarting.

4C or 4E — water supply error

If you see 4C with no drain symptoms, that’s a fill problem not a drain problem. But sometimes 4C appears with 5C because the wash cycle detected both too little fill and bad drain — Samsung’s sensors flag both. Check the water supply line is open and the filter screen on the inlet valve isn’t clogged.

Samsung ThinQ Smart Diagnosis

If your Samsung dishwasher is connected to the SmartThings app, you can run Smart Diagnosis remotely. The app reports the specific failure and sometimes guides through DIY fixes. Worth checking before pulling the unit out.

Standard drain failure pattern

Behind the error codes, Samsung’s drain system uses the same basic components as other brands: filter assembly, drain hose, drain pump with impeller. The DIY fixes are universal — clean the filter, check the hose, inspect the impeller, force a drain cycle.

How to fix a Samsung dishwasher not draining

Run through these in order.

1. Check the display for error codes. Note any code (5C, OC, 4C, etc.) before clearing it. Samsung error codes tell you a lot about where to start.
2. Run Smart Diagnosis (if connected). Open SmartThings on your phone, run Smart Diagnosis on the dishwasher. The app may identify the specific failure.
3. Towel out standing water. Clear the tub so you can work in there.
4. Pull and clean the filter. Samsung uses a cylindrical filter at the back of the tub bottom. Twist counterclockwise to release. Rinse under hot water with dish soap, scrub gently, reinstall. Twist clockwise to lock.
5. Inspect the drain hose route. Pull the toe kick, verify a high loop is in place before the disposal or sink connection. Straighten any kinks.
6. Verify the disposal knockout plug. If a recent install, confirm the plug inside the disposal inlet was removed.
7. Check the drain pump impeller. With the filter out, shine a flashlight into the pump cavity. Remove any visible debris with needle-nose pliers.
8. Force a drain cycle. On most Samsung dishwashers, press and hold the Start/Reset button for 3 seconds, or select the Drain Only cycle if available. Pump runs for 90 seconds.
9. Cycle the power. If error codes persist after fixing the obvious issues, unplug the dishwasher (or trip the breaker) for 5 minutes. This sometimes clears latched error states on Samsung control boards after Tampa storm-season power events.

When to call a Samsung dishwasher repair tech

If the filter is clean, the hose is clear, the impeller is free, the disposal knockout is out, and you’ve cycled the power — and the 5C or OC error persists — the drain pump motor or the drain sensor has failed. Both require diagnostic tools.

Samsung dishwasher drain pump replacement in Tampa runs $230-380 including parts and labor. Drain sensor and control board work runs $300-480. Samsung parts have 3-5 day lead time on some models, so labor scheduling factors in.

Samsung dishwashers are generally decent quality through year 8-10. Past that, error codes start stacking up (drain, sensor, control board) and replacement sometimes becomes the better math. Perfect Appliance Repair Tampa gives you the honest call after diagnosis.

For broader Samsung issues, see Samsung appliance repair Tampa. For the full DIY flow on any brand, see dishwasher not draining — 8 causes and fixes.