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HomeRepair HelpThermador Dishwasher RepairThermador Dishwasher takes too long Repair
Thermador Dishwasher takes too long
If your Thermador dishwasher takes too long, the problem is often tied to weak water circulation that leaves the machine washing poorly and stretching the cycle. The most likely cause is a damaged wash impeller, which may not create enough pressure to push water through the spray arm and wash arm system. Next, check the filter assembly, including the filter, screen filter, and strainer in the sump, since clogged filters restrict water flow and can make a dishwasher cycle too long or seem like the dishwasher is not washing properly. If those parts are clear, a failing circulation pump is another common cause, especially if the motor only hums after the dishwasher fills. In some models, the wash impeller can be replaced on its own, while others require a full pump and motor assembly. If your Thermador dishwasher runs for hours, leaves dishes still dirty after the dishwasher cycle, or your dishwasher takes too long to finish, start with these parts first. Enter your model number on RepairClinic.com to find the exact Thermador replacement part that fits your specific dishwasher.
01 - Thermador Dishwasher Wash Impeller
The wash impeller is a small plastic blade that forces water up through the wash arms. If the impeller is broken or is missing some of its fins, it might not generate enough pressure to force the water up through the wash arms. On most models, you can replace the wash impeller independently of the pump and motor assembly. Search for your model number to determine if your impeller is replaceable. If the impeller cannot be replaced separately, you will have to replace the entire pump and motor assembly.
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Highly Likely
02 - Thermador Dishwasher Filter Assembly
A dishwasher's filter assembly usually consists of both a course and a fine filter located in the sump. If one or both of these filters is clogged, you will get low water flow and poor washability. If the filters cannot be cleaned effectively or if they are damaged, they will need to be replaced.
Highly Likely
03 - Thermador Dishwasher Filter
A dishwasher's filter assembly usually consists of both a course and a fine filter located in the sump. If one or both of these filters is clogged, you will get low water flow and poor washability. If the filters cannot be cleaned effectively or if they are damaged, they will need to be replaced.
Highly Likely
04 - Thermador Dishwasher Screen Filter
A dishwasher will usually have both a course and a fine screen filter located in the sump. If one or both of these filters is clogged, you will get low water flow and poor washability. If the filters cannot be cleaned effectively or if they are damaged, they will need to be replaced.
Highly Likely
05 - Thermador Dishwasher Strainer
Dishwashers will use a strainer located in the sump to catch food particles. If the strainer is clogged, you will get low water flow and poor washability. If the stainer cannot be cleaned effectively or is damaged, it will need to be replaced.
Highly Likely
06 - Thermador Dishwasher Circulation Pump
The circulation pump uses a motor and impeller to force water up through the wash arms. If the circulation pump is defective, the dishes won’t be cleaned properly. If the motor isn’t making any noise or is just making a humming sound after the dishwasher has filled, the motor may be burned out. First, ensure that power is getting to the motor. Second, to ensure that the impeller can turn, check the pump housing for debris. If power is getting to the motor and the pump is clear of debris, the motor might need to be replaced. Be aware that the circulation pump may be challenging to replace, although many do-it-yourselfers ha...
Common
Frequently Asked Questions
Why does my Thermador dishwasher take too long to finish a cycle?
Can a clogged filter make my Thermador dishwasher run for hours?
How do I know if the wash impeller is causing my Thermador dishwasher to take too long?
My Thermador dishwasher fills with water but is not washing properly and takes too long. Is the circulation pump bad?
How do I find the right Thermador dishwasher part for a long cycle problem?
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