DC31-00187A Drain Pump for Washers – What Problems Does This Part Fix?
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Understanding the Problem
What the DC31-00187A is and why it matters: The DC31-00187A is a drain pump assembly used on many Samsung front-load and top-load washers. Its job is to pump wastewater out of the tub and into the home drain during the drain/spin part of the cycle. When this pump fails you’ll see water remaining in the drum, long cycles, or error codes. Step-by-step diagnostic and repair instructions: 1. Confirm the symptom: Run a drain/spin or drain-only cycle and listen. If the washer tries to drain but no water leaves (or you hear a humming/noise or nothing at all), the pump is suspect. Check for error codes (e.g., "nd", "UE", or drain-related codes) in your manual. 2. Check the easy things first: a. Unplug the washer or turn off breaker and shut off the water supply. b. Inspect the drain hose for kinks, clogs, or improperly installed high-loop or air gap issues. c. If your model has a user-accessible pump filter (usually at the front bottom), open it and remove debris, coins, lint, or small objects. 3. Observe pump behavior: Reconnect power briefly, start a drain cycle, and listen at the pump area. Humming with no water flow usually means jammed impeller or a seized motor; silence often means motor failure or no power. 4. Access the pump: a. Tools: screwdriver set, pliers, bucket or towels, multimeter, and possibly a nut driver. b. Unplug the washer. Remove the necessary access panel (front lower panel or back panel depending on model) to reach the pump. Place towels and a shallow pan under the pump to catch water. c. Disconnect the pump electrical connector and the inlet/outlet hoses (loosen clamps). Inspect hoses for blockage and remove any foreign objects from the pump inlet. 5. Inspect and test the pump: a. Manually turn the impeller (if exposed) — it should rotate freely. If it’s blocked, remove debris and re-test. b. Use a multimeter to check continuity across the pump motor terminals. A typical good pump will show a low resistance (tens to hundreds of ohms). Open/infinite reads indicate a burned winding or open circuit. 6. Replace the pump if needed: a. Remove the mounting fasteners and lift the pump out. Compare the old pump to the DC31-00187A replacement to confirm fit and inlet/outlet orientation. b. Install the new pump: attach hoses with clamps, reconnect the electrical connector, and secure the pump mount. c. Reassemble access panels, restore power, and run a drain/spin test to confirm proper operation and check for leaks. 7. Final checks: Verify the washer completes a full cycle, spins normally, and no abnormal noises or leaks appear. Safety note: Always disconnect power before accessing internal components, and have towels/bucket ready to catch residual water. If you are uncomfortable working with electrical components or lifting the washer, hire a qualified technician.
Common Symptoms
Washer does not drain or spins with water still in the tub, long or stuck cycles, audible humming from the pump area, grinding noises, water leaking under the machine, or drain-related error codes.
Common Causes
- Pump impeller jammed by debris (coins, socks, lint, small objects)
- Pump motor burned out or electrical failure (open winding, short)
- Blocked or kinked drain hose or clogged pump filter preventing flow
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Helpful Repair Tip
If the pump hums but won’t move water, remove the discharge hose or access the pump inlet and have a helper run a drain cycle — if water reaches the pump but doesn’t exit, replace the DC31-00187A; if no power/hum, check wiring and control board.
Frequently Asked Questions
Can I clean the pump instead of replacing it?
Yes — if the pump only has a jammed impeller or debris, you can often clear it and restore function. Inspect hoses and filter first and remove foreign objects. If the motor hums but the impeller turns freely after cleaning and the pump still won't move water, the motor is likely failing and the pump should be replaced.
How long does it take to replace the DC31-00187A drain pump?
Typical replacement time is 30–60 minutes for someone comfortable with basic appliance repair. Time varies by model and access panel location. Required tools: screwdrivers, pliers, nut driver, multimeter, towels/bucket. Always unplug the washer first.
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