How water moves through a dishwasher
An inlet valve under the tub lets in a measured amount of water, and a float switch stops it from overfilling. A heater warms the water, the wash pump sprays it through the lower and upper arms, and it falls back through a filter into the sump. At the end of each phase, a drain pump pushes the used water up a looped hose and out through an air gap or straight into the sink drain or disposal.
Almost every fault falls somewhere on that path, which is why a technician's first questions are about where water is, or is not, at the end of a cycle.
Symptoms and what they usually cost
| What you notice | Usual causes | National range |
|---|---|---|
| Water left in the tub | filter, drain hose, air gap, disposal plug, drain pump | $50–$400 |
| Residue on dishes | filter, spray arms, water temperature, detergent, fill | $50–$300 |
| Leaks under the door | door gasket, overfilling, detergent suds, level | $50–$300 |
| Bad smell | food in the filter and sump, standing water, drain loop | $50–$400 |
| Will not fill | inlet valve, float switch, supply valve closed | $75–$600 |
| Will not start | door latch, control panel, fuse, power | $100–$600 |
| Broken door | springs, cables, hinges, latch | $150–$600 |
Fixr's national guide to dishwasher costs, updated January 31, 2025, parts and labor.
Dishwasher not cleaning or not drying
A dishwasher not cleaning well usually has a clogged filter, spray arms with blocked holes, or water that is not hot enough when the cycle starts. Run the kitchen tap until it is hot before starting, clean the filter at the bottom of the tub, and check that the arms spin freely by hand. A dishwasher not drying is often normal for modern machines, which use less heat than older ones; rinse aid makes a visible difference. When a heated-dry model stops drying altogether and the tub stays cool, the heating element may have failed; Fixr lists element replacement at $150 to $300.
Dishwasher leaking or won't start
A dishwasher leaking from the door is most often a worn or dirty gasket, suds from the wrong detergent, or a machine that is not level. Leaks from underneath are usually the inlet valve, the drain hose connection or a pump seal, and they deserve a quick look because the water runs out of sight. When a dishwasher won't start, check the door latch first: the machine does nothing unless it senses the door is locked. Then check the breaker and, on some models, a child lock or delay-start setting shown on the panel. If all of that is fine, the control panel or a thermal fuse is the likely part; Fixr lists control panel replacement at $200 to $500.
What the parts cost
| Part | Parts and labor |
|---|---|
| Soap dispenser | $50–$80 |
| Drain hose | $50–$100 |
| Filter | $50–$125 |
| Gasket | $50–$150 |
| Inlet valve | $75–$150 |
| Spray arm | $75–$150 |
| Heating element | $150–$300 |
| Pump | $150–$400 |
| Control panel | $200–$500 |
| Motor | $400–$600 |
Same Fixr guide. Fixr's brand table runs from $50 at the low end for every brand it lists to $400 for Whirlpool and $600 for LG and KitchenAid at the high end; it notes that Whirlpool and Bosch parts tend to be cheaper and easier to find.
Repair or replace an older dishwasher?
A dishwasher has a short expected life, 9 years in the NAHB study, so the age matters more here than for a range or a dryer. A $150 inlet valve on a six-year-old machine is an easy yes; a $500 motor on a ten-year-old one usually is not. Running costs are modest: ENERGY STAR estimates that a standard-size ENERGY STAR certified model costs about $50 a year to run and saves about 5,800 gallons of water over its life.
Federal standards set the floor. Dishwashers made since May 30, 2013 must meet the current energy and water limits, and stricter ones are codified for machines made from April 23, 2027. In May 2025 the Department of Energy proposed rescinding the tighter water limit and returning a standard-size model to 6.5 gallons per cycle; as of September 2026 that proposal had not been written into the regulation. The repair or replace page covers the decision across all appliances.
Before you call
- Clean the filter. Twist it out from the bottom of the tub and rinse it; many drain, smell and cleaning complaints end here.
- Check the sink drain. If the kitchen sink drains slowly, the dishwasher cannot drain either.
- Note what happens. Where the water is, which light flashes, which code shows and at what point the cycle stops.
- Find the model number. It is often on a label along the edge of the door or the tub opening; the manual shows where.
Questions people ask next
How long should a dishwasher last?
The National Association of Home Builders puts the expected life of a dishwasher at 9 years, one of the shortest in its study, level with microwave ovens and ahead only of trash compactors. Fixr says most are built to last 8 to 10 years, with some high-end models lasting 15 to 20 with good maintenance.
Is it worth repairing a dishwasher?
For a filter, drain hose, inlet valve, door spring or gasket, almost always. For a motor, control panel or door on a machine near the end of its expected life, compare with Fixr's $400 to $700 for a new dishwasher plus $100 to $300 to install it. Most experts, Fixr notes, treat a repair over half the price of a new model as not worth it.
What does a technician charge just to look at it?
Fixr says most charge a $50 to $75 diagnostic fee and deduct it from the bill if they do the repair; some quote $35 to $100 for the service call. Labor runs $50 to $100 an hour plus parts.
Sources
- How much does it cost to repair a dishwasher?, Fixr, updated January 31, 2025.
- Study of Life Expectancy of Home Components (PDF, third-party copy), National Association of Home Builders and Bank of America Home Equity, February 2007.
- Dishwashers, ENERGY STAR (EPA), read September 29, 2026.
- Consumer Dishwashers, U.S. Department of Energy, read September 29, 2026.
- 10 CFR 430.32, Energy and water conservation standards and their compliance dates, eCFR, current as of September 22, 2026.
- Proposed rescission of the amended water-use standards for residential dishwashers, U.S. Department of Energy (Federal Register), May 16, 2025.
Reviewed October 1, 2026. Spotted an error? Write to admin@compareappliancerepair.com.