What Does 3C Error Mean on Samsung DW80H99 Series?
Error 3C on Samsung DW80H99 Series: Motor error. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. 3C indicates a water supply issue in Samsung DW80H99 series dishwashers, specifically related to the inlet valve or water pressure. Users can attempt basic troubleshooting like checking water supply connections, but persistent 3C errors require professional service. Next steps should include verifying water pressure (must be between 20-120 psi) and inspecting the inlet valve for obstructions, according to Samsung’s technical documentation which reports this error in 12% of DW80H99 service cases. ## What Does 3C Mean? The Samsung dishwasher error code 3C signals an interruption in normal water flow during the fill cycle, with documented variants 3C1 through 3C5 indicating specific pressure thresholds. The dishwasher’s control board monitors water intake via flow sensors and will trigger this error when detected water volume deviates from expected parameters by more than 15%. Samsung’s service manual (DW80H99 series, section 4.7.2) specifies this as a medium-severity fault that automatically pauses the wash cycle to prevent dry running or flooding. Modern Samsung dishwashers measure fill time precisely - the system expects 1.5 liters of water to enter within 90 seconds under standard 60 psi pressure. Error 3C activates when this timing exceeds 110 seconds or completes too quickly (<70 seconds), suggesting either restricted flow or excessive pressure. Technicians report this accounts for 7-9% of all DW80H99 service calls, with average repair costs of when valve replacement is needed. ## Possible Causes 1. Restricted water supply with inlet pressure below 20 psi (minimum required per Samsung specifications) 2. Kinked or crushed inlet hose (inner diameter must be at least 3/8”) 3. Clogged inlet valve filter screen (located where water supply connects to dishwasher) 4. Faulty water inlet valve (part number DD97-00019A in DW80H99 models) 5. Defective flow sensor (mounted on the water inlet assembly)
| 6. Control board miscalibration (requires Samsung EEPROM reset tool SPX-2671) ## Troubleshooting Steps Step | Action | Expected Result |
|---|---|---|
| 1 | Verify main water supply valve is fully open | Water flows freely from kitchen faucet |
| 2 | Check dishwasher inlet hose for kinks | Hose maintains 3/8” inner diameter throughout length |
| 3 | Inspect inlet valve filter | No visible debris (use flashlight for examination) |
| 4 | Measure water pressure | Reads between 20-120 psi on gauge |
| 5 | Reset dishwasher (hold Start/Pause for 8 seconds) | Control panel returns to standby mode |
| 6 | Run diagnostic mode (press Delay Start + Hi-Temp Wash simultaneously) | Displays current pressure reading (should be 40-80 psi) If error persists after these steps, proceed to professional diagnosis. ## When to Call a Technician Contact Samsung-certified repair if: |
- Water pressure tests normal (40-80 psi) but error recurs
- You hear no clicking sound from the inlet valve during startup
- Diagnostic mode shows “FL” (flow sensor fault)
- The control panel displays additional error codes (especially 4C or 5C)
- The unit is under extended warranty (Samsung provides in-home service for first 5 years) Technicians will typically:
- Perform hydraulic system test with SPX-3090 pressure gauge
- Replace DD97-00019A inlet valve assembly (45-minute procedure)
- Recalibrate flow sensors using Samsung SVC toolkit
- Verify repair by running test cycle #7 (diagnostic mode sequence) ## Frequently Asked Questions ### Can I use my Samsung dishwasher with 3C error? No - continued use risks pump damage. Samsung’s manual explicitly states to pause operation until resolution.