Dishwasher Not Draining Repair
Dishwasher Not Draining Repair is a common appliances job. Homeowners typically spend about $35 on materials if they tackle it themselves, while hiring a professional usually runs $100–$300 depending on access, parts, and local labor rates. DIY can save up to about $265 versus a full pro job when the work stays straightforward.
Expect roughly 1-2 hours for a careful DIY attempt versus about 30-60 min for a seasoned pro. Difficulty is rated 3/5 (moderately challenging) with low risk. Typical materials include dishwasher drain pump, drain hose, hose clamp. Common tools: screwdriver, adjustable wrench, bucket.
Use the sections below to weigh DIY against hiring: cost ranges, safety alerts, common mistakes, and a personalized analysis for your ZIP code.
Typical Cost
Cost estimates based on cataloged material prices and regional pro rates. Run the analysis for US-wide retailer prices and a regional professional-cost estimate. How we estimate costs.
Is this a DIY job?
AI-assisted educational guidance — not reviewed by a licensed professional. Review policy.
- Typical DIY time1-2 hours
- Typical pro time30-60 min
- Permit requiredNo
What affects the cost
- Local labor rates for appliances pros and whether the visit is emergency vs. scheduled.
- Brand and quality of parts (dishwasher drain pump, drain hose, hose clamp) versus economy alternatives.
- Access difficulty (tight spaces, multi-story work, finished surfaces that must be protected or repaired after the job).
When to hire a pro
- If you cannot unplug the unit or lock out power, or water is present near electrical components, stop and call an appliance tech.
- If you cannot fully stop the water, or water is near electrical outlets/panels, stop DIY and call a plumber.
- High-impact DIY mistake — Not testing the drain pump for continuity: Always test the drain pump for continuity before replacing it to ensure the correct part is ordered.
- Ask whether the service call fee applies toward the cost of a drain pump replacement if one is needed. Many companies waive or credit the diagnostic call-out fee if you authorize the repair during the same visit.
- Request that the technician inspect the entire drain path, including the air gap, garbage disposal inlet, and the high-loop in the drain hose, since a partial clog anywhere in the system can cause repeat drainage failures.
- Ask if they will check the dishwasher's check valve and drain solenoid, since a stuck check valve or failed solenoid can mimic a clogged pump and cause water to backflow into the tub after the cycle ends.
- Inquire about a warranty on both the parts and labor, and ask whether the repair is worth doing versus replacing an older dishwasher. A technician can assess the overall condition of seals, racks, and the wash pump to help you decide.
- Get 3 quotes from licensed appliance repair technicians
Hazards & safety alerts
-
medium electrical Appliance shock or stored charge
Servicing dishwasher not draining can expose live terminals or capacitors. Water near power also creates a shock path.
Stop and call a pro if: If you cannot unplug the unit or lock out power, or water is present near electrical components, stop and call an appliance tech.
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low water damage Water damage if supply is not controlled
Opening lines or fittings for dishwasher not draining can release pressurized water and flood cabinets, floors, or ceilings if shutoffs fail or are skipped.
Stop and call a pro if: If you cannot fully stop the water, or water is near electrical outlets/panels, stop DIY and call a plumber.
Materials you'll need
| Material | Est. Price |
|---|---|
| dishwasher drain pump | $25.00 |
| drain hose | $8.00 |
| hose clamp | $2.00 |
| Total (DIY materials) | $35.00 |
Tools: screwdriver, adjustable wrench, bucket
DIY steps
- Turn off the dishwasher and remove the lower dish rack to access the filter basket at the bottom of the tub. Twist the filter counterclockwise (or unscrew the retaining bolt on some models) and lift it out, then rinse it under hot running water and scrub with a soft brush to remove food debris and grease.
- Inspect the spray arm for clogged jets and remove any food particles blocking the water passages. Reinstall the clean filter and spray arm, then run a short rinse cycle to see if draining improves before proceeding to more involved steps.
- Open the under-sink cabinet and locate the dishwasher drain hose, which runs from the dishwasher pump to the garbage disposal or sink drain. Check the full length of the hose for kinks, flattening, or sharp bends that restrict water flow and straighten or reposition as needed.
- Place a shallow pan under the drain hose connection and loosen the clamp at the disposal or sink drain. Detach the hose and check the inlet fitting for a clog or a knock-out plug that was never removed on a new disposal; if a plug is present, tap it out with a screwdriver and hammer.
- If the hose is clear, disconnect the other end at the dishwasher pump and check for a clogged drain pump impeller. Use needle-nose pliers to remove any debris such as glass, toothpicks, or food chunks wrapped around the impeller vanes, then spin the impeller by hand to confirm it turns freely.
- Use a multimeter set to the ohms setting to measure the drain-pump winding resistance by probing its two terminals. Compare the reading with the model's service specification; infinite resistance indicates an open winding, while very low resistance may indicate a short. Order the exact replacement part for your model number and install it following the service manual.
- Reconnect all hoses and clamps, restore power, and run a drain-only or short wash cycle. Listen for the drain pump to activate and verify water flows freely through the disposal or sink drain. If water still remains, the issue may be in the pump motor control board and requires professional service.
Common DIY mistakes
-
medium Over-tightening drain hose clamp
Over-tightening the clamp can damage the hose or restrict water flow, causing the dishwasher to leak or not drain properly.
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low Not removing the knock-out plug
Not removing the knock-out plug in the sink drain or disposal can clog the drain hose and prevent the dishwasher from draining.
-
medium Not checking the spray arm for clogs
Failing to inspect the spray arm for clogs can lead to poor water circulation and prevent the dishwasher from draining properly.
-
high Not testing the drain pump for continuity
Not testing the drain pump for continuity can lead to a faulty pump that may not be replaced, causing the dishwasher to leak or not drain properly.
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medium Not listening for the drain pump to activate
Not listening for the drain pump to activate during a drain-only or short wash cycle can indicate a faulty pump motor control board that requires professional service.
Frequently asked questions
- How much does it cost to fix a dishwasher not draining?
- DIY materials typically run about $35. Hiring a pro usually costs $100-$300 depending on your area and the scope of the job.
- Can I fix a dishwasher not draining myself?
- It depends on the job. Difficulty is rated 3/5 and risk level is low. Run the free analysis on RepairSmart for a personalized DIY vs. hire recommendation.
- What are common mistakes when you fix a dishwasher not draining?
- Common DIY mistakes include: Over-tightening drain hose clamp; Not removing the knock-out plug; Not checking the spray arm for clogs. See RepairSmart for the full list and cost breakdown.
- What safety hazards should I watch for when working on dishwasher not draining?
- Key hazards include: Appliance shock or stored charge; Water damage if supply is not controlled. See RepairSmart for stop-conditions and the full safety list.
Not sure? Get a personalized recommendation
RepairSmart compares US-wide retailer prices with regional pro costs and gives you a weighted DIY-vs-hire recommendation in under 60 seconds.
About these estimates
- Numbers on this page come from the RepairSmart catalog (materials baselines and typical pro ranges). They are educational estimates, not contractor quotes.
- Personalized ZIP analysis may add live or cached retailer prices and regional pro signals when third-party data is configured.
- Read how costs and DIY scores are calculated, our safety & review policy, and about RepairSmart.
- If guidance is marked unreviewed, treat steps and tips as educational only—not a professional sign-off for your home.