Washing Machine Drain Pump — What It Does and How to Fix It
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Understanding the Problem
The drain pump is the electric pump that removes wash water from the tub and pushes it out through the drain hose. When the drain pump or its related components fail the washer won't empty properly, may make grinding/humming noises, leak, or display error codes. 1) Confirm the symptom and eliminate simple causes: - Run a drain/spin cycle and listen. If you hear a loud hum or grinding but no water movement, the pump motor may be jammed or failed. If you hear nothing and water stays, check for blocked hoses or a clogged pump filter first. - If your washer shows a drain error code (e.g., F02, E20, dE), look up the code for your model — many indicate a drain failure. 2) Basic checks before disassembly: - Unplug the washer and turn off the water. - Access the pump area: on front-load washers the pump is usually behind the lower front access panel; on top-load washers it may be at the front or bottom rear. Consult your model manual for panel removal. - Drain standing water using the drain filter/emergency drain hose or by siphoning into a bucket. - Visually inspect the drain hose and pump inlet for obstructions (coins, lint, small garments, paper, etc.). Remove any debris. - Check the drain hose for kinks or a clogged home plumbing trap. 3) Electrical and mechanical tests: - With the washer unplugged, disconnect the pump wiring harness and measure the pump motor coil with a multimeter for continuity. A healthy pump usually shows a finite resistance (tens to a few hundred ohms); an open reading (OL) indicates a burned/open motor. - Check for a short to ground by measuring between the motor terminal(s) and pump casing; a short could indicate internal failure. - Manually spin the pump impeller (if accessible). If it’s stiff or jammed, clear debris or replace the pump if impeller/pivot is damaged. 4) Remove and inspect the pump: - Place towels and a shallow pan under the machine to catch residual water. - Remove clamps and hoses from the pump (note hose positions and orientation). Cap hoses or plug openings temporarily to avoid spills. - Remove the pump mounting screws or clips and take the pump out. Inspect the impeller and inlet for damage. 5) Replace the pump if faulty: - Fit the new pump in place, secure mounting screws/clips, reconnect hoses and clamps, reconnect the wiring harness. - If your model has a pump filter, replace/clean the filter and its gasket. - Reassemble the access panel, restore power and water, and run a drain/spin cycle to test. 6) Final checks and troubleshooting if still not draining: - If the pump runs but won’t push water out, check the drain hose routing and the home drain/trap for clogs. - If the pump doesn’t run when commanded, verify that the control board and door/lid switch are sending power to the pump. Use a multimeter to confirm voltage at the pump during a drain cycle (only by someone comfortable working with live voltage). Safety note: Always unplug the washer before doing any internal work. If you must test with power applied (for advanced voltage checks), take extreme care or call a professional. Avoid running the pump with open plumbing connections or without the pump fully mounted.
Common Symptoms
Washer won't drain or spin, water remains in drum, loud humming/grinding during drain, leak at bottom/front of machine, drain error codes on display.
Common Causes
- Foreign object stuck in impeller or pump housing (coins, small garments, debris)
- Pump motor electrical failure (open winding or short to ground)
- Clogged/blocked drain hose, pump filter, or home plumbing trap
Popular Parts That Fix This Problem
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Helpful Repair Tip
Listen during a drain cycle: a humming/grinding noise with no water movement usually means the pump motor is seized or the impeller is jammed; a silent washer that won't drain often means an electrical failure or open motor winding.
Frequently Asked Questions
Can I run the washer without a drain pump temporarily?
No — the drain pump is required to remove water. Running the washer without a functioning drain pump will leave water in the drum and can cause overflow, damage, or error codes. You can manually drain the tub for a single load by siphoning or using the emergency drain hose, but replace the pump as soon as possible.
How much does it cost to replace a washer drain pump?
Parts typically range from about $30 to $150 depending on brand and whether you buy OEM or aftermarket. Labor (if you hire a technician) usually adds $100–$200 depending on local rates. If you’re comfortable with basic tools, most homeowner repairs are straightforward and save labor cost.
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