Set dish washer on normal cycle but later discovered that the motor was running but not washing. When I opened it I discovered that the motor was running (unit making noise and it was set on 30.) Dishes were still dirty.
You didn't mention what brand dishwaser you are talking about, but if it is a Bosch, they are known for having the impeller (which is in 2 parts) coming apart, so the part of the impeller that has the blades doesn't turn. In other dishwashers, I've seen the holes in the wash arms get clogged, especially if you don't have the removable filter installed correctly, or (if it's a GE), the filter plate on the bottom gets warped, allowing bood and debris to get in the wash arms and clog up the holes. We really need to know the brand and model number of the dishwasher (or any appliance) to be able to help you accurately.
SOURCE: motor noise
it could be something caught in motor empeller IE. a bit of glass, or motor could be faulty
SOURCE: Diswasher motor making noise during wash cycle
It could be the impeller on the motor. The impeller fits over the shaft of the motor and might have split/broken up. That funny noise is probably the shaft spinning inside the damage impeller. Fortunately the impeler is fairly inexpensive and easy to replace. I believe there are one or two parts/covers to remove that are held in by a roughly half dozen torx screws.
SOURCE: frigidaire dishwasher ultaquiet , model=FDB750RCC1
the first thing that your dishwasher does when you turn it on is drain when you turn it on you hear a motor running then it stops then it fills start the washer when it stops to start filling open the door should be no water in the unit if there is you have a drain problem and in fact are washing your dishes in dirty water can be several things that can cause drain problems a piece of food blocking the line at the sink where the drain goes in if its run to a disposer there is a knockout plug that should be removed just stick your finger in there to see if it was removed get you installation instructions and read the part about not removing the drain loop but just about all the time installers will lol if you cant find the instructions go to www.frigidaire.com under customer support can down load them there let me know what you find
SOURCE: dirty dishes
if water comes into machine then valve is ok.
open machine when in cycle and look to see if spray arms are rotating
if not, then take out and clean.
spray arms only rotate with water jetting out of angled nozzles at end and if these are blocked then no rotation and poor wash
SOURCE: Dishwasher cycle runs: tablet is not dissovlved, dishes dirty
If the dry cycle has a problem, check these:
Heating element
Drying fan
Thermostat
Heating element
Your dishwasher has an electrical heating element that helps to dry the dishes. If the element is burned out, the dishes won't dry properly, and you need to replace the element.
Drying fan
Many high-priced dishwashers have a small fan that blows air or heated air into the dishwasher to speed up the drying process. If the fan is defective, you need to replace it.
Thermostat
Some dishwashers have a thermostat that monitors the drying temperature. If the thermostat is defective, the heating element may not cycle on or off properly. If that's the problem, you need to replace the thermostat.
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