You ran a full cycle. The dishwasher beeped, you opened the door, and the plates still have food stuck to them. Maybe there's a gritty film on the glasses. Maybe the top rack came out worse than it went in. A dishwasher not cleaning dishes is one of the most common calls we get in Orlando, and the cause is almost never what people think.
Most homeowners assume the dishwasher itself is broken. Sometimes it is. But about half the time, the problem is something you can fix in ten minutes without spending a dollar.
Why your dishwasher isn't cleaning properly
After years of fixing dishwashers around Orlando, Winter Park, and Kissimmee, I can tell you the number one reason dishes come out dirty: the spray arms are clogged. Those little jets that shoot water during the cycle get blocked by food particles, grease, and mineral deposits. Central Florida has hard water, and that mineral buildup happens fast. Pull out the lower spray arm (it usually just lifts off) and hold it up to the light. If you can't see through the holes, that's your problem.
The second most common cause is overloading. People pack every dish they own into one load and wonder why nothing got clean. The spray arms need room to spin freely. If a large pot or cutting board is blocking the arm, it just sits there while water sprays at one spot. I've seen bottom racks so stuffed that the spray arm couldn't rotate at all.
Detergent issues come up a lot too. Using too much detergent is actually worse than using too little. Extra soap creates a film that redeposits on your dishes. And those gel pods that sit in the bottom of the tub instead of the dispenser? They dissolve too early in the cycle, before the water is hot enough to activate them properly. Put them in the dispenser door. That's what it's there for.
Things you can check yourself
Before you call anyone, try these:
- Pull out the bottom spray arm and rinse it under the faucet. Use a toothpick to clear each jet hole. Do the same for the upper arm if your model has one.
- Check the filter at the bottom of the tub. Most newer dishwashers have a twist-out filter that catches food debris. Check out our guide on common Samsung dishwasher error codes. If you've never cleaned it, prepare yourself. It's going to be gross. Rinse it under hot water and scrub it with an old toothbrush.
- Run your kitchen faucet on hot before starting the dishwasher. The first fill cycle uses whatever temperature the water line is sitting at. If that water is lukewarm, your detergent won't dissolve properly. You want the water entering the dishwasher to be at least 120 degrees.
- Look at how you're loading the top rack. Cups and bowls should face downward and slightly angled so water drains off. If they're sitting flat, they just collect dirty water and come out with puddles in them.
One more thing. Check the drain at the bottom of the tub for chunks of food or broken glass. A clogged drain means dirty water sits in the tub and recirculates over your dishes. That's why everything comes out feeling slimy.
When it's actually a mechanical problem
If you've cleaned the spray arms, cleared the filter, and loaded the dishwasher properly but dishes are still coming out dirty, something inside the machine is probably failing.
The wash motor is the most likely culprit. It's the pump that pushes water through the spray arms, and when it starts going, you'll notice the dishwasher sounds quieter than it used to. Less noise means less water pressure, which means food stays on your plates.
Water level is another one. The inlet valve controls how much water fills the tub. If it's going bad, the machine runs with barely enough water to reach the spray arms. You can actually check this yourself: open the door mid-cycle (carefully) and look. The water should cover the heating element at the bottom. If it doesn't, there's your answer.
Speaking of the heating element, that can fail too. Grease doesn't break down in lukewarm water, and detergent barely activates below 120 degrees. No heat, no clean. Some newer models use a flow-through heater instead of the coil at the bottom, but the result is the same when it goes out.
One I see a lot on Bosch and KitchenAid units: the soap dispenser latch. The spring mechanism wears out, the little door never pops open during the wash cycle, and the detergent just sits there unused. You'll know because the dispenser still has soap caked in it when you open up after a cycle.
Why this happens more in Central Florida
Orlando-area water is hard. That means high mineral content, mostly calcium and magnesium. Those minerals coat everything inside your dishwasher over time. The spray arm jets, the heating element, the filter screen, even the door gasket. Open up a five-year-old dishwasher in Kissimmee that's never been descaled and you'll see a thin white crust on every surface. Check out our guide on how long Florida appliances actually last.
Run an empty cycle with a cup of white vinegar on the top rack once a month. Check out our guide on what to do if your dishwasher is leaking. It dissolves mineral deposits and keeps things flowing. Some people use citric acid packets, which work even better. Either way, if you live in Orlando, Winter Park, Kissimmee, or anywhere on Central Florida well water, your dishwasher needs this maintenance more than the manual suggests.
The humidity here doesn't help either. If you leave the door closed after a cycle, moisture sits inside the tub and grows mildew. That musty smell on your "clean" dishes? That's mold in the door gasket or the drain hose. Clean the gasket with a rag and some vinegar. If the smell persists, the drain hose probably needs replacing.
When to call a repair tech
If you've gone through everything above and your dishes are still coming out dirty, it's time for a professional to look at it. A failing wash motor, a bad inlet valve, or a broken heating element are not weekend DIY projects for most people. Check out our guide on DIY appliance repair guide. Getting the wrong replacement part or installing it incorrectly can cause leaks, and water damage from a botched dishwasher repair costs a lot more than the repair bill would have.
We fix dishwashers across Orlando and the surrounding areas every week. Most of the time we can diagnose and repair the problem in a single visit. If you've been dealing with a dishwasher not cleaning dishes and you're in Orlando or nearby, give us a call at 561-320-7695 or book an appointment online. We'll figure out what's going on.