What Are the Most Common Dishwasher Problems?
A dishwasher that will not start is almost always a failed door latch or door switch, a $150 to $300 repair — and the other common dishwasher failures follow equally recognizable symptom patterns. Here is what each common symptom typically means.
Dishwasher Does Not Start
Most commonly a failed door latch or door switch. The dishwasher’s control board requires the door to be recognized as fully latched before starting any cycle. A latch that does not click fully into position, or a door switch that has failed, prevents all operation. Check that the door is fully latched and pushing closed firmly. A door latch repair costs $150 to $300 all-in. The latch part itself runs only about $25 to $60, so the trade’s minimum charge sets the floor, not the part: most companies enforce an $80 to $150 diagnostic or service-call fee, typically applied to the repair if you go ahead with it. A tripped thermal fuse (a safety device that opens in response to overheating) also prevents starting and costs $150 to $250 to replace. (For more on this, see How Long Does Dishwasher Repair Take?.)
Dishwasher Does Not Fill With Water
The water inlet valve is the most common cause. It opens on a signal from the control board to allow water into the dishwasher; when it fails (clogs, sticks closed), no water enters. Inspect the float switch first it sits at the bottom of the dishwasher tub and signals the control board to stop filling; if it is stuck in the up position, the dishwasher thinks it is full and will not fill. Float switch is DIY-accessible; water inlet valve replacement is $150 to $300 professionally installed. (For more on this, see DIY Dishwasher Fixes vs. When to Call a Pro.)
Dishwasher Leaks
Door gasket failure (the rubber seal around the door perimeter) allows water to drip from the door during cycles. A damaged spray arm can direct water toward the door seals rather than the dishes. A failed pump shaft seal drips water from below the unit. Door gasket replacement ($150 to $300) is the most common leak repair. Inspect the door gasket for cracks, tears, or sections where it has pulled away from the door frame.
Dishes Not Getting Clean
Common causes: clogged spray arms (blocked by food debris, mineral buildup, or hard water deposits), clogged dishwasher filter (most modern dishwashers have a user-cleanable filter at the bottom of the tub), low water temperature (check that the water heater supplies water at 120 degrees F), wrong detergent amount or old detergent, or incorrect loading that blocks spray arm rotation. Clean the filter and spray arms before calling for service. (For more on this, see Dishwasher Maintenance: How to Prevent Most Repairs.)
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project.
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
Making a Confident Decision
The information in this article is designed to help you ask better questions of the professionals you work with, evaluate their answers with more confidence, and understand the decisions involved in this type of home services project. It is not a substitute for professional assessment of your specific home.
Every home is different. Roof slopes, local weather, tree exposure, soil conditions, and existing system condition all affect what the right solution is for your specific situation. The general principles here apply broadly, but a professional who assesses your home in person will give you guidance that accounts for the details that general articles cannot.
When you are ready to move forward, getting at least two or three quotes from licensed, insured, local contractors is the most important practical step. It lets you compare approaches, assess contractor quality, and confirm that the solution proposed matches your specific situation and budget.
Cost figures on this page were checked against published pricing on August 29, 2026. How we source cost data.
