Quick answer: A Whirlpool washer that fills but won't drain is usually one of three problems: a clogged drain pump, a kinked drain hose, or a failed pump motor. The most common fix is replacing the drain pump — OEM WP3363394 — which costs around $43 and takes 30 minutes.
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Most likely culprit: Drain pump clogged or failed (60% of cases).
Time to fix: 30-45 minutes.
Difficulty: Medium — requires tilting the washer back.
If your Whirlpool washer fills with water but won't drain at end of cycle, three culprits cause 95% of cases ranked by frequency: drain pump clogged or burned out (60%), drain hose kinked or clogged (25%), or door/lid switch failed preventing drain cycle (15%). This guide shows how to diagnose which one in 10 minutes.
Cause 1 — Drain pump clogged or failed (60%)
Coins, hairpins, lint, and small clothing items get past the inner basket and lodge in the drain pump impeller. Pump motor either jams or burns out trying.
How to confirm:
- Unplug washer. Listen during drain phase — humming = motor running but jammed; silence = pump dead.
- Tilt washer back, locate drain pump (white plastic, near front-bottom).
- Remove drain hose at pump inlet. Check for lodged items (use flashlight + needlenose pliers).
The fix: If clogged → clear obstruction (15 min, $0). If pump burned → replace. OEM WP3363394. Typical price $40-$55. Difficulty: Medium — 30 min.
See Whirlpool Drain Pump WP3363394 →
Cause 2 — Drain hose kinked or clogged (25%)
The drain hose runs from washer to standpipe. Hose can kink behind washer (after moving), or build up soap-residue clogs over years.
How to confirm:
- Pull washer 6 inches from wall. Inspect drain hose — should be straight, no sharp bends.
- Disconnect hose from standpipe. Try blowing through it. If air doesn't pass freely, hose is clogged.
The fix: Straighten kinks (free) or replace hose (~$15-$25, OEM 285753). Difficulty: Easy — 15 min.
Cause 3 — Door/lid switch failed (15%)
Front-load and top-load washers have a safety switch that prevents draining if the door/lid isn't closed. When the switch fails, the washer thinks the door is open even when closed.
How to confirm:
- Run a drain-only cycle with door firmly closed.
- If no drain attempts, multimeter test the lid/door switch — should show continuity when closed, open when ajar.
The fix: Replace lid/door switch. OEM varies by model (WP8318084 common). Typical price $30-$50. Difficulty: Medium — requires opening top panel — 30 min.
Specs at a glance
| Item | Detail |
|---|---|
| Compatible models | WTW4855HW, WTW5000DW, WTW5105HW, WFW5605MW, +50 more |
| Typical part cost | $40-55 (pump) / $15-25 (hose) / $30-50 (switch) |
| Repair time | 30 min (pump) / 15 min (hose) / 30 min (switch) |
| Tools needed | Phillips screwdriver, pliers, multimeter, towels |
| OEM (pump) | WP3363394 (replaces 3363394, AP6007864) |
How to find your Whirlpool washer model number
Top-load: lift lid, sticker is under the lid hinge. Front-load: open door, sticker is on the door frame or front panel.
Frequently asked questions
Q: I hear the pump trying to run — should I replace it?
A: First clear obstructions. 70% of "humming pump" cases are objects jamming the impeller, not pump failure. After clearing, run a drain cycle. If still humming, then replace.
Q: Water everywhere when I removed the hose. Normal?
A: Yes. Place a shallow pan and towels before disconnecting. Some washers hold 1-2 gallons in the pump area.
Q: My washer is HE / front-loader. Same parts?
A: Different pump model. WP3363394 fits most top-load. Front-loaders often use OEM 280187 ($141, more expensive). See Whirlpool Drain Pump Assembly 280187 for front-load.
Q: How long should a Whirlpool drain pump last?
A: 8-12 years if you don't wash items with hard objects. Coins are the #1 killer.
Q: Will my washer error code tell me which part failed?
A: Some models display F02 or F21 for drain issues. Check your manual. F02 typically = slow drain (clog), F21 = no drain after 8 min (pump failure or major clog).
Q: Is replacing the pump worth it vs buying a new washer?
A: Yes if washer is < 8 years old. New washer ~$600-$1200 vs $43 pump + 30 min DIY = obvious savings.
Related parts you may need
- Whirlpool Washer Drain Pump Assembly 280187 — for front-load HE models
- Whirlpool Washer Clutch Assembly 285785 — fix if washer also won't spin
- Whirlpool Washer Agitator Cam 285811 — if agitator slips during wash
When to call a professional
- Major leak from washer base — could be tub seal failure, complex repair
- Water in basement / damaged floor — water mitigation specialist needed first
- Repeated pump failures in <2 years — internal washer balance issue
For the drain symptoms above, DIY is safe and saves $150-200 in service fees.
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Written by Vinh Nguyen · Founder of RepairKitHub. Researches OEM appliance parts compatibility daily.
Last updated: 2026-05-08