Samsung WF45R6100APUS Drain Pump — OEM & Compatible Replacement Guide
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Understanding the Problem
What this part does: The drain pump removes wash water from the tub and forces it out through the drain hose. If it fails, the washer won't drain and may display a drain error or stop mid-cycle. 1) Initial checks (before replacing): a. Unplug the washer and turn off the water. b. Check error codes — many Samsung washers show a drain error (commonly 4C/5C or similar). c. Inspect the drain hose for kinks, high loops, or clogs. Remove the hose from the standpipe and blow/flush it out. d. Remove and clean the pump filter/trap (front lower access or behind the lower panel) — many blockages are trapped here. e. Run a drain/spin cycle and listen. If you hear the pump motor humming but no water moves, the impeller may be blocked or broken. If nothing runs and no hum, there may be an electrical problem. 2) Diagnose the pump: a. Access the pump (see replacement steps below). Disconnect the pump wiring harness and check for continuity across the motor terminals with a multimeter. Typical good pump motors have measurable low-ohm resistance; an open circuit indicates a failed motor. b. With the harness connected and the machine powered (use caution), run a drain cycle and check for 120V AC at the pump motor harness (US models). No voltage — problem may be control board, door switch, or wiring. Voltage present but pump doesn't run — replace the pump. 3) Replacement steps (practical how-to): a. Safety first: Unplug the washer and turn off water. b. Prepare to catch water: place towels and a shallow pan under the front. c. Remove lower access panel or tilt the washer back (follow manual) to reach the pump. d. Drain residual water: open the small drain cap/drain hose or disconnect the lower hose into a bucket. e. Note/remove hose clamps and remove the drain hose and any small hoses from the pump. f. Disconnect the electrical connector(s) from the pump. g. Remove mounting screws/clips and remove the pump assembly. h. Compare the old pump to the replacement to ensure matching hose locations, mounting points, and connector type. i. Install the new pump: secure with screws/clips, attach hoses and clamps, reconnect wiring. j. Reinstall access panels, restore water and power, and run a test drain cycle. 4) Verify repair: run an empty drain/spin cycle and verify no leaks, proper draining, and no unusual noises. If the washer still doesn't drain but the new pump runs and has voltage, check for blockages in drain line or venting issues. Safety note: Always unplug before working on wiring or internal components. If you're not comfortable working with electrical tests or lifting the machine, hire a technician.
Common Symptoms
Washer won't drain or pump water out, error codes indicating drain fault (4C/5C or similar), loud grinding or rattling from front lower area, leaked water from pump area.
Common Causes
- Blocked pump filter or foreign object (coin, sock, debris) jamming the impeller
- Failed pump motor (electrical winding failure or seized bearings)
- Wiring/control board/door switch preventing the pump from receiving power
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Confirm pump failure by listening for a humming motor during a drain cycle and checking for continuity on the pump motor; if voltage is present at the pump but it doesn't run, replace the pump.
Frequently Asked Questions
How do I know for sure the drain pump is bad and not just a clog?
Start by clearing the drain hose and pump filter/trap — many ‘won't drain’ problems are clogs. If the washer still won’t drain, run a drain cycle and listen: a humming sound with no water movement often means the impeller is jammed or broken. Use a multimeter to check pump motor continuity; an open circuit indicates a failed motor. If the pump receives proper voltage during a drain cycle but doesn’t run, replace the pump.
Can I clean or repair the pump instead of replacing it?
You can often remove debris or free a jammed impeller if the motor itself is otherwise okay. If the impeller is broken, bearings are seized, or the motor winding is open, the pump should be replaced. Cleaning is a good first step and cheaper, but replacement is the reliable fix for electrical or mechanical failure.
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Whether your dishwasher won't drain, your dryer stopped heating, or your fridge isn't cold, we've created simple repair guides for the most common appliance problems homeowners face. Each guide explains what's going wrong, the most likely causes, and which replacement parts fix the issue. When you're ready to order, we link directly to ProsourceParts.com where you can search by model number and get the right part shipped fast.