Why is my dishwasher not draining? Common causes, what you can check, and when to call technicians.
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Food debris, labels, or other gunk can accumulate in the dishwasher's drain filter or the drain pump itself, preventing water from exiting.
The flexible hose connecting the dishwasher to the sink drain or garbage disposal can become kinked or clogged with food particles and grease.
The motor that powers the drain pump may have failed, meaning it can no longer push water out of the dishwasher.
If a new garbage disposal was recently installed, the knockout plug inside the dishwasher drain connection might not have been removed, blocking the drain.
The air gap, a small fixture on the sink or countertop, can become clogged, preventing proper drainage.
Less commonly, the electronic control board that manages the dishwasher's cycles may not be signaling the drain pump to activate.
Locate and remove the filter at the bottom of the dishwasher tub. Clean out any food particles or debris. Rinse it thoroughly under running water.
Carefully pull the dishwasher out slightly (if possible) to check if the drain hose is bent or kinked. Straighten any kinks.
If your dishwasher drains into a garbage disposal, ensure the knockout plug was removed when the disposal was installed. You may need to disconnect the hose from the disposal to check.
Remove the decorative cover of the air gap on your sink. Unscrew the cap and clean out any debris inside the air gap body and hoses connected to it.
After removing the filter, you may be able to see the drain pump's impeller. Check if it's blocked by debris and try to gently rotate it to ensure it's not seized.
Water is not draining after multiple cleaning attempts.
Persistent standing water can indicate a more serious internal issue like a failed pump or a blockage deep within the system that requires professional tools and expertise.
You suspect a faulty drain pump motor.
Replacing a drain pump motor involves working with electrical components and potentially disassembling parts of the dishwasher, which is best left to trained technicians.
The dishwasher is making unusual noises during the drain cycle.
Strange grinding, humming, or buzzing sounds can signal a failing motor or a pump obstruction that could lead to further damage if not addressed promptly.
You are uncomfortable performing any of the diagnostic steps.
Safety is paramount. If any step involves electrical connections, water spillage, or requires specialized tools, it's safer to call a professional.
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Look up your brand's error codes for dishwasher not draining — we cover the most common codes for each brand we service.
This page provides general diagnostic guidance for dishwasher not draining. Specific causes and repairs vary by appliance brand, model, and condition. For accurate diagnosis, contact a licensed appliance repair technician. Repairs involving refrigerant systems, gas lines, or high-voltage circuits require certified professionals — DIY attempts on these systems may be illegal and dangerous.
Five steps from your first call to the warranty receipt. No surprises.
Your technician examines the appliance, listens to your description, and notes the model + serial for parts lookup. Visual + audio-based diagnostics first — non-invasive.
Targeted tests on the failing subsystem (compressor, control board, heating element, motor, etc.) to identify the exact root cause. You get a clear explanation, not jargon.
Up-front estimate before any work begins: cost, parts, and the realistic likelihood of success vs. recommending replacement on an old or uneconomical unit. You decide.
After the repair we run the appliance through its normal cycle on-site — never "it should work now, call us if it doesn't." You sign off when it's actually working.
Receipt with warranty terms in writing. Plus a quick walkthrough of how to extend the appliance's life (filter cleaning, drain maintenance, etc.) — included free.
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