Dishwasher symptoms and what causes them
A dishwasher fills with a measured amount of hot water, sprays it through the arms with a wash pump, drains it with a drain pump, and repeats. Where that sequence breaks down tells you which part to look at.
| What you notice | What it usually points to |
|---|---|
| Standing water in the bottom after a cycle | Clogged filter, kinked or clogged drain hose, a clogged disposal or air gap, the knockout plug left in a new disposal, a stuck check valve, or a failed drain pump |
| Dishes come out gritty or still dirty | Clogged filter recirculating food, blocked spray arm holes, low water temperature, a weak inlet valve not filling enough, or a failing wash motor |
| Hums but no water comes in | Closed supply valve, failed water inlet valve, or a float switch stuck in the "full" position |
| Water on the floor in front | Worn door gasket, suds from using dish soap or the wrong detergent, a cracked spray arm spraying the door, or the dishwasher not level |
| Water under the unit or in the cabinet | Leaking inlet valve connection, drain hose clamp, pump seal or a cracked tub |
| Won't start, lights on or off | Door latch switch, control lock turned on, a blown thermal fuse, a tripped GFCI or breaker, or a control board fault |
| Dishes come out wet | Empty rinse aid dispenser, failed heating element or drying fan, or normal behavior for plastics on condensation-dry models |
| Grinding, rattling or loud humming | Glass, a bone or a pit in the pump or chopper, or a jammed drain pump |
| Bad smell from the tub | Food in the filter, water sitting in the sump from a slow drain, or a drain hose without a high loop letting sink water back in |
5 things to try before a repair visit
- Clean the filter. Most dishwashers made in the last decade have a removable filter in the bottom of the tub that needs rinsing every few weeks. A packed filter causes poor cleaning, bad smells and slow draining.
- Run the disposal. The dishwasher often drains into the disposal. Run it with water for a few seconds, then start a drain cycle.
- Check the air gap. If there's a small chrome cap on the sink deck next to the faucet, pull the cover and clear any debris from inside.
- Check the control lock. Many models have a lock or child lock that makes the dishwasher look dead. The manual shows how to turn it off.
- Run the kitchen tap hot. Let the sink run until the water is hot before starting the dishwasher, so the first fill isn't cold.
How a dishwasher repair works
Most dishwasher parts sit under the tub, behind the kick plate at the bottom. Some repairs can be done from the front; others need the dishwasher slid out of its opening.
- Run it and watch. The technician runs the dishwasher, or its built-in test cycle on models that have one, to see whether it fills, washes, drains and heats.
- Remove water and the filter. Standing water is removed and the filter and sump are checked for debris and broken glass.
- Test the parts. Behind the kick plate, the inlet valve, float switch, drain pump, wash motor, heating element and door switch are tested with a meter, and the connections are checked for drips.
- Pull it out if needed. A cracked tub, a leaking pump seal or a connection that can't be reached from the front means unscrewing the dishwasher from the countertop and sliding it out, with the water and power disconnected first.
- Test cycle. After the repair, the dishwasher runs while the technician checks under the unit for leaks and confirms it drains completely.
What affects the cost of a dishwasher repair
Clearing a clog is the smallest dishwasher repair. A wash motor or control board is the largest, and a cracked tub usually means replacement.
- The part. Door gaskets, float switches and inlet valves are smaller repairs. Drain pumps and heating elements are moderate. Wash motors and control boards cost more.
- Pulling the unit out. Repairs that require sliding the dishwasher out of the cabinet take longer, especially with tile or a raised floor in front of it.
- Panel-ready models. Dishwashers with a cabinet-matching door panel take more care to open and close up.
- How long it leaked. A slow leak can corrode the inlet valve, wiring connectors or the board under the tub, so more than one part may need replacing.
- Parts for your model. Some boards and pumps are model-specific and need to be ordered.
Dishwasher repairs usually make sense, except for a cracked tub or a failed board on an older unit. Our guide to repair or replace decisions goes through the math.
Dishwasher problems you shouldn't wait on
A dishwasher leak is easy to miss because it often runs under the unit and into the cabinet or subfloor, out of sight. Treat these as urgent:
- Water appearing at the base of the cabinets next to the dishwasher.
- Flooring near the dishwasher that's swelling, lifting or soft.
- A burning or electrical smell, or smoke from under the door.
- The GFCI or breaker trips every time the dishwasher runs.
Close the water valve under the sink, turn off the dishwasher's breaker, and call (941) 393-1160. Standing water in the tub can wait for the visit.
Using your dishwasher during a Bradenton boil water notice
Boil water notices do happen in Bradenton. On July 21, 2024, a power outage at the city's water treatment plant caused a citywide water outage, and the city issued a precautionary boil water notice. In August 2025, a water main break led to a boil water notice for homes near 8th Avenue East.
During a notice, the question is whether the dishwasher is safe to use. According to the CDC, a household dishwasher is generally safe if the water reaches a final rinse temperature of at least 150°F, or if the dishwasher has a sanitizing cycle. Your owner's manual or the manufacturer can tell you which applies to your model.
That rinse temperature depends on the dishwasher's heating element, so a dishwasher with a failed heater may not reach it. Signs of that are dishes coming out cool and wet at the end of a cycle, or a sanitize light that never comes on.
If you notice either one, have it checked before you count on the dishwasher during the next notice. Until then, wash by hand with boiled or bottled water, or use disposable plates.
Garbage disposal repair, and why it affects the dishwasher
In most kitchens the dishwasher drains through the garbage disposal, so a disposal problem often shows up as a dishwasher that won't drain. Saul's Appliance Repair repairs both.
- Hums but doesn't spin: the grinding plate is jammed. Switch it off at the wall, and use the hex key that fits the socket on the bottom of most units to free it. Never reach into the disposal.
- Completely silent: the motor's overload tripped. Press the red reset button on the bottom of the unit. If it trips again right away, the motor or a jam is the problem.
- Leaking from the top: the sink flange seal has loosened.
- Leaking from the side: a loose dishwasher hose or drain pipe connection.
- Leaking from the bottom: often the housing itself has corroded through, which usually means replacing the disposal.
- Dishwasher backs up into the sink, or sink water into the dishwasher: a clogged disposal or drain line, or a dishwasher drain hose without a high loop or air gap.
Before the technician comes
- Unload the dishwasher and remove the lower rack if you can.
- Empty the cabinet under the sink so the water valve, drain hose and disposal can be reached.
- Write down any error code or flashing light pattern.
- Find the model number, usually on a label on the edge of the door or the side of the tub opening.
After the repair: habits that prevent the next call
Rinse the filter every few weeks, more often if you don't scrape plates. Run the disposal before starting the dishwasher so it drains into a clear line. Keep rinse aid filled, and use dishwasher detergent only; dish soap makes enough suds to leak out the door.
For the first few cycles after a repair, open the kick plate or look under the sink once the cycle ends to make sure everything is dry.
Dishwasher and disposal questions
Why is there water in the bottom of my dishwasher?
A little water around the filter area is normal on many models. An inch or more means it isn't draining.
Clean the filter, run the garbage disposal, and check the drain hose under the sink for kinks. If the disposal was just installed, its knockout plug may still be in place. If those are fine, the drain pump or the check valve is the likely cause.
Why are my dishes still dirty or gritty after a cycle?
Grit usually means a clogged filter is sending food back onto the dishes. Other causes are spray arms with blocked holes, water that isn't hot enough at the start of the cycle, too little water from a weak inlet valve, or a wash motor that's losing strength. Clean the filter and spray arms and run the kitchen tap hot before starting a cycle; if it still happens, it's a repair.
Why don't my plastic dishes dry?
Plastics hold less heat than glass and ceramic, so they stay wet on many dishwashers, especially newer models that dry by condensation instead of a heating element. Using rinse aid helps. If glass and ceramic are also coming out wet, check the rinse aid dispenser first, then the heating element or drying fan.
Do you repair garbage disposals?
Yes. We repair residential garbage disposals that are jammed, humming, leaking or not turning on, and checks the shared drain when a disposal problem is backing up the dishwasher.