Quick Answer: A Whirlpool washer that fills but won't drain almost always has one of three issues: 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 cause: Clogged or failed drain pump (60% of cases).
Repair time: 30-45 minutes.
Difficulty: Medium — requires tilting the washer back.
If your Whirlpool washer fills with water but won't drain at the end of the cycle, three causes account for 95% of cases, in order of frequency: a clogged or burnt-out drain pump (60%), a kinked or clogged drain hose (25%), or a failed lid/door switch preventing the drain cycle (15%). This guide shows you how to diagnose which one it is in 10 minutes.
Cause 1 — Clogged or failed drain pump (60%)
Coins, hairpins, lint, and small clothing items can bypass the inner tub and get stuck in the drain pump impeller. The pump motor then jams or burns out trying to operate.
How to confirm:
- Unplug the washer. Listen during the drain phase — humming = motor running but jammed; silence = dead pump.
- Tilt the washer back, locate the drain pump (white plastic, near the front-bottom).
- Remove the drain hose at the pump inlet. Check for jammed objects (use a flashlight and needle-nose pliers).
The fix: If clogged → remove the obstruction (15 min, $0). If the pump burned out → replace it. OEM WP3363394. Typical price $40-$55. Difficulty: Medium — 30 min.
View Whirlpool Drain Pump WP3363394 →
Cause 2 — Kinked or clogged drain hose (25%)
The drain hose runs from the washer to the standpipe or utility sink. The hose can get kinked behind the washer (after moving it), or accumulate clogs from soap residue over the years.
How to confirm:
- Pull the washer 6 inches (15 cm) from the wall. Inspect the drain hose — it should be straight, without sharp bends.
- Disconnect the hose from the drain pipe. Try blowing through it. If air doesn't pass freely, the hose is clogged.
The fix: Straighten any kinks (free) or replace the hose (~$15-$25, OEM 285753). Difficulty: Easy — 15 min.
Cause 3 — Failed lid/door switch (15%)
Both top-load and front-load washers have a safety switch that prevents draining if the lid/door isn't closed. When the switch fails, the washer thinks the door is open even when it's closed.
How to confirm:
- Run a drain-only cycle with the door securely closed.
- If it doesn't attempt to drain, test the lid/door switch with a multimeter — it should show continuity when closed, open when ajar.
The fix: Replace the lid/door switch. OEM varies by model (WP8318084 is common). Typical price $30-$50. Difficulty: Medium — requires opening the top panel — 30 min.
Specifications at a glance
| Item | Detail |
|---|---|
| Compatible models | WTW4855HW, WTW5000DW, WTW5105HW, WFW5605MW, and 50+ models |
| 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 the lid, the sticker is under the hinge. Front-load: Open the door, the 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 any obstructions. 70% of "humming pump" cases are objects jamming the impeller, not a pump failure. After clearing, run a drain cycle. If it still hums, then replace it.
Q: Water spilled everywhere when I removed the hose. Is that normal?
A: Yes. Place a shallow pan and towels before disconnecting. Some washers hold 1-2 gallons of water in the pump area.
Q: My washer is HE / front-load. Are the parts the same?
A: Different pump model. WP3363394 works for most top-load models. Front-load models often use OEM 280187 ($141, more expensive). View 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 cause of damage.
Q: Will my washer's 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 it worth replacing the pump versus buying a new washer?
A: Yes, if the washer is less than 8 years old. A new washer costs ~$600-$1,200 versus a $43 pump + 30 min DIY = clear savings.
Related parts you might need
- Whirlpool Drain Pump Assembly 280187 — for HE front-load models
- Whirlpool Washer Clutch Assembly 285785 — fixes if the washer also won't spin
- Whirlpool Agitator Cam 285811 — if the agitator slips during wash
When to call a technician instead of DIY
- Major leak from the washer base — could be a tub seal failure, complex repair
- Water in the basement / damaged flooring — you need a water mitigation specialist first
- Repeated pump failures in less than 2 years — indicates an internal washer balance issue
For the drain symptoms described above, DIY is safe and saves you $150-$200 in service fees.
Written by the RepairKitHub Team · Last updated: 2026-05-08
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