Why Your Dishwasher Isn't Cleaning Properly
Troubleshoot common causes of poor dishwasher performance.
When dishes emerge spotted, filmy, or still dirty, the problem usually has a straightforward cause. Before calling for service, check these common issues.
Water Temperature
Dishwashers need hot water - ideally 120-125°F entering the unit. Run hot water at the kitchen sink before starting a cycle. If your water heater is set too low, cleaning suffers.
Spray Arm Blockage
Inspect spray arms for clogs. Food particles and hard water deposits block the small holes. Remove arms and clean thoroughly with a toothpick or wire.
Detergent Issues
Too much detergent causes residue; too little means poor cleaning. Premium brands like Miele and Bosch are calibrated for specific detergent amounts. Also, old detergent loses effectiveness - buy fresh supplies.
Loading Problems
Overloading or poor loading prevents water from reaching all surfaces. Don't nest items. Face dirty surfaces toward spray arms. Ensure spinning arms can rotate freely.
Filter Cleaning
Most modern dishwashers have removable filters that trap food debris. A clogged filter means dirty water recirculates. Clean monthly or more often with heavy use.
When It's More Serious
Persistent problems after addressing these issues may indicate pump failure, heating element problems, or control board issues. Our diagnostics identify the root cause.
Customer Relations
Jennifer has spent a decade helping MetroWest homeowners navigate appliance issues. She writes about the customer experience and what to expect from professional repair services.
Expertise: Customer service, Local market knowledge, Service expectations, Cost considerations