A dishwasher in San Leandro that stops draining, leaves food on the dishes, leaks or will not start usually has a clogged filter, a drain or wash pump problem, a worn seal or a door latch fault — all repairable parts. The diagnosis starts by watching what the machine does through a cycle: when it fills, whether it sprays, when it tries to drain. That says more than the dirty plate at the end.
Start with the filter
Most modern dishwashers no longer grind food on the way out. They catch it in a filter at the bottom of the tub that you are meant to lift out and rinse. When it is never cleaned, the machine drains slowly, leaves grit on glasses and starts to smell. Twist it out, rinse it under the tap with a soft brush, and look in the sump below it for glass chips, bones or fruit pits. It takes two minutes and fixes more “broken” dishwashers than any part.
What the symptoms usually mean
| What you notice | Likely cause | What it usually takes |
|---|---|---|
| Standing water after the cycle | Clogged filter, kinked drain hose, blocked disposal inlet or drain pump | Clearing, or drain pump replacement |
| Dishes dirty or gritty | Dirty filter, clogged spray arms, low fill or a weak wash pump | Cleaning, inlet valve or wash pump |
| Water on the floor | Door seal, loose hose, pump seal or inlet valve | Seal, hose or valve repair |
| Lights on but will not start | Door latch, control lock, delay start or control board | Latch or board, after testing |
| Completely dead | No power at the outlet or connection, thermal fuse or control | Electrical diagnosis |
| Grinding or humming | Glass or a pit in the pump, worn pump motor | Pump clearing or replacement |
| Door drops open or slams | Door springs or cables | Spring and cable replacement |
One drain cause worth knowing: if the dishwasher stopped draining right after a new garbage disposal was installed, the knockout plug inside the disposal’s dishwasher inlet may never have been removed.
Bosch, Thermador and Miele dishwashers
Bosch dishwashers display error codes that point the diagnosis in the right direction:
- E15 — water in the base pan. The leak protection has tripped, so the leak itself has to be found: a door seal, a hose connection, a pump seal or the inlet valve. Drying the base without fixing the leak only brings the code back.
- E24 and E25 — drain problems. E24 usually means a kinked or blocked drain hose or clogged filters; E25 points to a blocked drain pump or its cover.
Thermador belongs to the same BSH group as Bosch, and its dishwashers are diagnosed along similar lines. Miele dishwashers have their own leak protection and show faults on the display; note the exact message and the point in the cycle where it appeared before you switch the machine off. KitchenAid, Viking and other brands get the same step-by-step drain, fill and wash testing.
Not cleaning: usually water, not detergent
Most cleaning complaints come down to how much water reaches the dishes and how hot it is. Clogged spray-arm holes, a greasy filter, an inlet valve with a blocked screen or a wash pump losing strength all weaken the spray. Cold water slows things down too: run the kitchen tap until it is hot before you start, so the first fill is not cold. Loading matters as well — a tall pan or cutting board can stop a spray arm from turning or block the detergent door from opening.
Leaks under the counter
A slow dishwasher leak can soak the subfloor and the cabinet for weeks before it shows. If you see water, turn off the supply valve under the sink (it usually feeds the dishwasher) and switch the dishwasher off at its breaker or unplug it. Finding the exact source matters: a door seal, a loose drain hose clamp, a pump seal and a cracked inlet valve leak in different places and cost different amounts to fix.
What affects the price
Most dishwasher repairs fall between $89 and $400. Clearing drains, door springs and door seals are at the low end; drain pumps, inlet valves and latches are in the middle; wash pump motors and control boards are at the top. You see the price before work starts, same-day service is usually possible when you call before noon, and repairs carry a 90-day warranty.
Before you call: safe things to check
- The filter is clean and seated (see above).
- The control lock or child lock is off, and no delay start is set.
- The drain hose under the sink is not kinked or crushed behind a trash can.
- If the dishwasher drains through the garbage disposal, run the disposal first — a full disposal can back up the dishwasher drain.
Repair or replace?
A pump, seal, latch or valve on a machine that otherwise cleans well is worth fixing. A leaking tub, or several failures at once on an older budget model, is when replacement becomes the better use of the money. We will give you the repair price first so you can compare.