Washer Not Draining? Drain Pump DC31-00178D – Fix Drainage Failure Fast
A Samsung washer that won't drain — leaving standing water in the drum after every cycle — points directly to a failed drain pump. In most Samsung front-load and top-load washers, this is caused by a failed drain pump motor assembly. When it fails, water cannot be expelled from the drum, cycles stall mid-wash or at the spin phase, and error codes such as 5E, SE, or 5C appear on the display. ⚡ Common failure point in Samsung-built front-load and top-load washers across the WF45, WF50, WA50, and WV60 series. Part DC31-00178D is the genuine OEM replacement that restores full drain function, clears drainage error codes, and allows cycles to complete normally.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ QUALIFIER 1 — washer powers on and fills with water normally
- ✔ QUALIFIER 2 — drum rotates and agitates correctly during the wash phase
- ✔ QUALIFIER 3 — drain hose is not kinked, clogged, or improperly routed
- ✔ ONLY problem is water remaining in the drum — washer will not drain or spin out
Not sure? Send us your model number — we'll confirm before you order.
🔧 Common Symptoms
- Standing water left in drum after cycle ends
- Error codes 5E, SE, or 5C displayed on the control panel
- Washer pauses or stops during the drain or spin phase
- Loud humming or grinding noise when the machine attempts to drain
✔ If these symptoms match, this is the most likely failed component in the system.
✔ In most cases, replacing this drain pump restores normal drainage and spin operation immediately.
📦 Part Details
- Part Number: DC31-00178D
- Type: OEM Washer Drain Pump Motor Assembly — fits front-load and top-load configurations
- Replaces: DC31-00187A
- Brands: Samsung
Inspect the drain pump filter and coin trap while the pump is removed — debris buildup is a leading cause of pump failure. Clearing the filter at the same time prevents the new pump from failing prematurely and adds only 5 minutes to the repair.
⚙️ Installation
Skill Level: MODERATE — 30–45 minutes. Disconnect power and water supply before servicing. For front-load models, remove the lower access panel and tilt the machine back to access the pump. Disconnect the wiring harness and drain hoses, swap the pump assembly, and reconnect all connections before running a drain-only test cycle to confirm operation.
✓ Compatible Models
Confirmed compatible with WA50R5200AW/US, WA50R5400AV/US, WA50R5400AW/US, WF45R6300AV/US, WF45R6100AW/US, WF45T6000AV/A5, WF45R6100AP/US, WF50R8500AV, WA45T3400AP, WF45R6100AC/US, WF45T6000AW/A5, WA41A3000AW/A4, WF45A6400AV/US, WV60A9900AV/A5, WF50A8600AV/US, WF45T6000AP/US, WF45B6300AC/US plus additional Samsung models. Contact us to verify your model number before ordering.
💡 Pro Tip
After installing the new pump but before reinstalling the access panel, run a short drain-only or spin cycle and watch the pump connections for leaks. Catching a loose hose clamp at this stage takes 30 seconds to fix — catching it after full reassembly costs another 20 minutes of disassembly.
✓ Model-Specific Repair Pages
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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