- Appliance
- dishwashers
- Diagnostic
- $80
- Labor warranty
- 90 days
- Parts warranty
- 365 days
Thermador dishwasher not draining, or loads coming out wet
Independent Thermador dishwasher repair in Fleming Island and Orange Park FL: standing water in the sump, wet loads, a leak at one front corner, stalled cycles.
Symptoms we see
- Standing water in the sump at the end of a cycle
- Dishes coming out gritty on the lower rack only
- Cycle running for hours without advancing
- Water on the floor at the left-hand front corner
- Door falling open instead of holding at any angle
- Loads coming out wet when they used to come out dry
Thermador dishwashers are quiet, which is a design achievement and a diagnostic problem. A machine you cannot hear is a machine that gives you almost no information about what it is doing, so the fault usually announces itself only at the end of the cycle — wet dishes, standing water, or grit.
Standing water is a path problem
Water left in the sump is not automatically a pump. The drain path runs sump → drain pump → hose → high loop or air gap → disposer or standpipe, and a blockage anywhere on that run produces the same symptom.
We work the path from the far end backwards, because the far end is where the problem usually is and it costs nothing to check. A disposer installed without the knockout plug removed will stop a dishwasher draining from day one — that is a genuinely common finding on kitchens that have had the disposer replaced. Next, the drain hose high loop: without it, the machine siphons back what it just pumped out. Then the check valve, then the filter stack, then the pump itself.
The filter stack is worth naming separately because it is the one part of a dishwasher an owner is meant to clean. If it has never been removed, it will be holding a compacted mat of debris that restricts everything downstream. That is maintenance, not a repair, and we will show you how to do it rather than book a return visit for it.
Gritty on the bottom rack, clean on the top
That is a lower spray arm complaint. Either the arm is not turning, or it is turning and its jets are blocked, or the diverter that alternates pressure between the upper and lower arms has failed and the lower arm never gets its share. Spin the lower arm by hand with the racks out: if it binds, the bearing or the hub is the fault. If it spins freely and the machine still leaves grit, the diverter and the circulation pump are the next stops.
A blocked jet is nearly always a physical intruder rather than a deposit — a seed, a shard of label paper, a fragment of glass or a chip of bone that has come through the filter stack and lodged in the arm. Clearing it takes minutes. Finding out how it got past the filters matters more: a fine screen that has been left out after cleaning, or one that is not fully seated in its housing, will keep feeding the same debris to the same arm until it is put back properly.
Drying, and the difference between wet and undried
Thermador’s upper-tier dishwashers dry with a mineral desiccant that pulls moisture out of the cabinet and releases it as heat on the next cycle, rather than by running a heating element. It is efficient and it is very effective, and when it stops working the complaint is specific: loads that used to come out dry now come out damp, with no other change in behaviour.
Before condemning anything, we check the obvious things that mimic a drying failure — rinse aid dispenser empty or set to zero, a cycle selection that skips the drying phase, plastics loaded where they will always stay wet, and the door being left closed for an hour after the cycle ends. Roughly half of “the dryer is broken” calls end at the rinse aid dispenser.
Leaks and doors
A leak at the front-left corner is usually the door seal or the tub-to-door interface, and it is worth knowing that a dishwasher can leak from the vent rather than the seal when it is overfilled with the wrong detergent. Excess suds push water where water is not meant to go, and no part replacement fixes that.
A door that falls open instead of holding position has a broken door spring, cable or pulley. On an integrated machine carrying a heavy custom panel, that assembly is under real load, and a door left in that state will eventually damage the hinge mounts. It is worth fixing early.
Every visit: flat-rate diagnostic credited toward the repair, written estimate before any part is ordered, genuine OEM parts, and our standard labor and parts warranty.
What does dishwashers repair cost here?
The visit is $80. Beyond that, the honest answer is a band and not a number, because the same symptom has two or three candidate causes and they do not cost the same. The bands that fit this page are below. Parts and labour together, the work on this sheet lands between $440 and $1,050. The exact number is set down in writing once the fault has been read, and nothing is ordered until you have seen it.
| Repair | Parts and labour |
|---|---|
| Diagnostic visit, credited to the repair | $80 |
| Control board or touch panel | $440–$1,050 |
What do owners ask before booking dishwashers work?
- There is water standing in the bottom at the end of every cycle. Is the pump dead?
- Check the cheap half first. A kinked drain hose behind the cabinet after other trades have worked there, a blocked filter, or a lost high loop will hold water just as convincingly as a failed drain pump, and none of them is a part. The drain path is traced end to end before anything is quoted.
- Why do loads come out wet when they used to come out dry?
- These machines dry with a condensing cycle rather than a hot element, so drying depends on the final rinse reaching temperature and the vent flap working. A tired vent, a weak rinse heat or too much rinse aid skipped will all read as poor drying. Vent and fan work on this machine sits at $270–$730.
- Water is on the floor at one front corner. Does that mean a new tub?
- Rarely. A leak that appears at a front corner is far more often the door gasket, the vent, or a loose hose clamp than a split tub. A full cycle is run with paper laid down so the source is seen rather than assumed, and gasket and door work is $200–$660.
- Is it ever worth repairing a dishwasher rather than replacing it?
- On a fitted machine of this class, far more often than not. A drain path traced and cleared is the $80 visit and no part at all; a gasket is $200–$660 and a board is $440–$1,050. Set either against an appliance that was bought as part of the cabinetry and the comparison answers itself.
What owners said about dishwashers
4.6 out of 5, across 73 customer reviews. Each one below is a single visit, in the words of the person who paid for it.
The upper rack adjuster had given way on one side, so the rack sat at a tilt and the arm could not clear it. He replaced both sides, then ran a load with the tall glasses I had been avoiding using.
Evangeline W.
Detergent was sitting undissolved in its cup at the end of every wash. The wax motor on the dispenser flap had failed. Small part, one visit, and he checked the spray arms while he had the racks out anyway.
Octavian K.
The filter housing had packed solid and the smell was in the kitchen rather than in the machine. He stripped and cleaned the whole sump, showed me the part I should be rinsing monthly, and did not try to sell me a pump.
Cassian B.