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Symptom Diagnostic
Dishwasher Not Cleaning DishesHere's What's Actually Wrong
Save the guesswork. A real technician reviews your model number and a short video, then builds a Technician Decision Report with four honest options and real pricing. The $50 Quick Check fee becomes credit toward your repair if you proceed.
When a dishwasher stops cleaning well, the cause is usually clogged spray arms, a failed heating element (no hot water during wash), low incoming water temperature, or a worn pump. Detergent and rinse aid matter, but they're not the problem in most cases.
What's Actually Happening
The Most Common Causes
These are the failure modes our technicians see most often on this symptom — listed in rough order of frequency. We don't publish step-by-step repair instructions for liability reasons, but the diagnostic process below identifies which one applies to your machine before any parts get swapped.
Clogged spray arm jets
Hard water scale and food debris block the small holes. Water sprays unevenly. Cleaning the arms restores coverage.
Failed heating element
Without heat the wash water doesn't reach the temperature needed to cut grease. Dishes come out with film and residue.
Cold incoming water
Dishwashers expect 120°F water. If your water heater is set too low or the supply line is too cold, wash cycles never reach effective temp.
Worn wash pump impeller
Pump still runs but doesn't push enough pressure. Spray arms turn slowly and coverage suffers.
Failed water inlet valve or restricted supply
Not enough water reaches the tub for a proper wash.
Is It Worth Fixing?
The Honest Answer
Yes — every cause. Spray arm cleaning is sometimes free at the diagnostic. Heating element $200–$300. Wash pump $300–$400. No scenario where a cleaning issue makes a dishwasher not worth fixing alone. Parts availability and labor complexity matter more than the age of the machine. A well-built ten-year-old appliance with an available part is often worth fixing twice. A newer unit with a discontinued board is the harder call. Our techs lay both options out side-by-side — repair cost vs. replacement cost — and let you decide. Try the replacement calculator for a quick framing, but every situation is different.
How the TDR Works
The 4-Option Technician Decision Report
After your $50 Quick Check (or $100 in-home diagnostic), a real technician — not a chatbot — reviews your model, video, and symptoms. They build a Technician Decision Report with four honest options:
Option 1
OEM Part Only
We source the exact OEM part and ship directly to you. You install. Best for confident DIYers who want guaranteed-fit parts.
Option 2
Amazon Equivalent Part Only
We source a verified compatible part at a lower price and ship directly. You install. Cost-effective when fit is straightforward.
Option 3
OEM Part + Labor
We source the OEM part, ship it, and our technician installs it. Best when fit is critical or labor access is complex.
Option 4
Equivalent Part + Labor
We source an equivalent part, ship it, and install it. Balances cost and convenience.
Important if you choose labor: do not start the job yourself. Once an appliance has been opened or partially worked on, our technician may need to charge additional labor — or may decline to take over the repair.
You pick which option works for you. No surprises, no hidden costs. We don't share specific part numbers — we source the parts ourselves and ship them directly to your door, so you never have to hunt for the right SKU.
Pricing
Real Numbers, No Mystery
Most repairs for this symptom land in the range below. The diagnostic confirms exactly which job it is before any quote — and the diagnostic fee credits toward your repair labor.
Quick Check (chat + tech review)$50
In-Home Diagnostic$100
Most dryer repairs$150-$300
Most washer repairs$200-$350
Most refrigerator repairs$200-$600
Sealed-system & specialtystarting at $200
Your diagnostic fee is never wasted. Every dollar you spend on the Quick Check ($50) or in-home diagnostic ($100) goes directly toward your repair labor if you decide to move forward. You're not paying for a diagnosis AND a repair — you're paying for a diagnosis that becomes a credit toward your repair. No double paying, ever.
FAQ
People Also Ask
Why are my dishes still dirty after the dishwasher?
Most common causes: clogged spray arms, no hot water during wash, weak wash pump, or wrong detergent. The diagnostic checks each one.
What temperature should my water heater be for the dishwasher?
120°F minimum is the industry standard. Below that, modern phosphate-free detergents struggle to dissolve grease. Energy Star confirms 120°F as the right setting.
Will more detergent help if dishes aren't getting clean?
Usually not — and often makes it worse. Too much detergent leaves residue. The real causes are mechanical (spray, heat, pump), not chemical.
How much does it cost to fix a dishwasher that doesn't clean?
$150 for cleaning service. $250–$400 for heating element or pump repairs.
Do I have to pay the diagnostic fee AND the repair cost?
No. The diagnostic fee applies to repair labor. One payment.
Related Symptoms
Other Things That Could Be Wrong
Where We Service
Middle TN + Louisiana
Whether you're in Nashville or Hammond, the diagnostic process is the same. We service Middle Tennessee and Louisiana with six experienced technicians.
Outside the cities listed? Chat with Ant — we'll confirm coverage before you pay anything.
Get Started
Chat with Ant — Get a Real Answer Today
Chat with Ant — tell us what's wrong, share a quick video and your model number photo, and a real technician will build your Technician Decision Report. No hold music, no guessing, no commitment until you see your options.