How much does it cost to fix a dishwasher that won't drain?

The short answer on cost

A dishwasher that suddenly won't drain is usually a blockage, and blockages are cheap to fix.

If the problem is a failed drain pump, a stuck check valve, or a control fault, a licensed tech runs $150–$500 in 2026 with parts and labor included.

The gap between those numbers is huge, which is exactly why you should do the free checks first. Most people who call a pro for a drain issue had a clog they could have cleared in ten minutes.

Don't let anyone quote you a pump replacement over the phone. A good tech confirms the pump is actually dead before selling you one.

Where the money goes

Most of these you may already own, so real spend is often under $20.

The pro range of $150–$500 breaks down roughly into a service call and diagnostic of $90 to $150, a drain pump part of $70 to $160 depending on brand, and labor to pull and reinstall the machine.

A stuck check valve or clearing a deep hose clog lands at the lower end, around $180 to $250, since there's no expensive part involved.

Control board faults are the wild card. A board can run $150 to $350 by itself, and once labor is added, you're often looking at replacement territory on an older machine.

Brand matters. Bosch, Miele, and other imports carry pricier pumps and boards than a Whirlpool or GE, so the same repair can swing $60 to $120 based on the badge alone.

How we built these numbers

Cost ranges reflect 2026 US pricing pulled from appliance repair service calls, common pump and board part prices across major brands, and typical labor rates of $90 to $130 per hour.

The DIY figures assume basic hand tools and consumable supplies, not specialized equipment.

Likelihood rankings come from what field techs actually find when a dishwasher suddenly stops draining, where clogs and install errors far outnumber true component failures.

Your final cost depends on your brand, your region's labor rates, and whether a part has to be ordered. Treat these as planning ranges, not fixed quotes.

What's actually causing it

Sudden means physical. When a dishwasher drained fine yesterday and won't today, something got stuck. Slow declines over weeks point to gradual buildup, but an overnight failure is almost always an object or a clog.

Start at the bottom of the tub. The filter clogs first because it catches everything, and a full filter starves the pump of water it can move.

If you just had a garbage disposal installed, look there before anything else. Installers forget to punch out the knockout plug more often than they'd admit, and the dishwasher literally cannot drain past it.

The drain hose is the next suspect. Grease collects in the corrugated ridges, and a shifted trash can behind the sink cabinet can kink it flat.

Only after those three come up clean should you suspect the pump itself. A jammed impeller from a bone or glass shard is common. A truly burned-out motor is less common but does happen, usually on machines past the 8-year mark.

Work through it in order

Kill the power first. Flip the breaker for the dishwasher, not just the door switch, because the door switch doesn't cut power to the pump wiring.

Bail out the standing water with a plastic cup and finish with a sponge. You need a dry tub floor to reach the filter, and you don't want dirty water spilling when you pull parts.

Twist the filter counterclockwise, lift it out, and rinse it under hot water. Scrub the mesh and clear any sludge from the sump hole underneath. This alone fixes a large share of cases.

Now go under the sink. Find where the dishwasher hose connects to the disposal or air gap. If the disposal is new and there's a plastic plug in that inlet, tap it out with a screwdriver and fish the loose piece out of the disposal.

Detach the drain hose over a bucket and check for a clog or kink. If it's plugged, a stiff wire or a garden hose flush usually clears it.

Put everything back, restore power, and run a rinse cycle. Watch the first two minutes of the drain phase.

If water still won't leave and you hear the pump humming, the impeller is likely jammed or the pump is failing. That's your line to call a pro.

• Power off at the breaker
• Bail standing water
• Clean the filter and sump
• Knock out the disposal plug if present
• Clear or straighten the drain hose
• Test with a rinse cycle

DIY or call someone

The clean-out work is genuinely DIY-friendly. Filter, hose, and disposal plug checks need no special tools and carry almost no risk if the power's off.

The line gets crossed at the pump and the wiring. Replacing a drain pump means removing the machine, disconnecting water and electrical, and reaching the pump housing. It's doable for a confident DIYer but easy to botch, and a bad reinstall causes leaks.

Anything involving the control board, the solenoid, or a breaker that trips during drain belongs to a licensed appliance tech. Those are electrical faults, and guessing gets expensive or dangerous.

Honest take: if you've done the three clean-out checks and it still won't drain, that's the moment to call. You've already saved yourself a service call if it was a clog, and you're not throwing good time at a job that needs a meter and a parts source.

Can this wait?

It's moderate urgency. Nothing's going to flood your kitchen tonight if the door stays shut, but you shouldn't sit on it for a week either.

The real clock is the standing water. Dirty water in the tub starts smelling within a day or two and grows mold and bacteria against the door gasket.

If you keep running cycles hoping it drains, you're risking a healthy pump. A pump straining against a clog can burn out, turning a $50 clog into a $350 repair.

Bail the water out, leave the door cracked to dry, and stop using the machine until it's fixed. That buys you time without making things worse.

When these calls spike

Drain complaints jump every year from late November through early January. Holiday cooking means heavy grease and food loads, and filters clog faster than anyone expects.

The other pattern is the weekend-project fallout. Someone installs a new garbage disposal on Saturday, the dishwasher won't drain by Sunday, and the knockout plug is sitting right there unpunched.

If your drain trouble started right after a disposal swap or a big holiday meal, you've probably already found your answer.