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Improper loading or over loading of dishes and glass ware that blocks the spray arm from rotating; check your user's guide for proper loading methods.
the holes in the spray arm can be plugged from food particles or other debris, like coffee grounds; remove the spray arm and clean out the holes; run water through the arm to verify there is no blockage.
check to see if the spray arm became disconnected from the feed tube or the feed tube from the water inlet feed hose.; reconnect hose or tighten down on hose clamps
check for any filter blockages; remove food particles and debris
the tub itself could be under filling, because of a restricted water inlet valve; pour 1 to 2 quarts of water into the tub of the dishwasher and run it; if the performance improves, replace the water inlet valve with a new one; DO NOT try to repair the old valve- it will fail once it's taken apart and put back together.
the circulating motor drives a water pump that rotates an impeller, which creates water pressure to go through the washer arms and out the holes. The jetting action of the water pressure exiting the spray arm holes propels the arm to spin...if the water pump impeller is worn, damaged, or impeded by food debris, the cleaning action will be greatly diminished; inspect and clean or replace the impeller if necessary.
If the aforementioned trouble shoot and repair methods do not correct the problem, then a more in depth diagnostic check will have to be done by a qualified repair technician to check switches that controls the water/drain pump, (if it is a dual action model for example); to verify if the switch or the pump itself has failed.
Is the dispenser door opening.....f not the the dispenser is faulty
It the dispenser is opening but the product dose remain plugged in the cavity, the top wash arm may not be turning.
Clean out all of the particles blocking the top spray arm holes and spin the arm to ensure ti turns freely.
Also check that there aren't any items placed it the top rack that could stop the arm from rotating freely.
Product not coming out of the dispenser id usually always due to the top spray arm . if it is blocked with particles you may not have been cleaning the filter in the sump properly and 'bits' of food ate passing th filter, Make sure the filter in the sump is well firmly in place.
The last important point is to always run the machine at 60 degrees or more You need temperature to do the job properly.
There is a possibility the water pressure itself is low from the kitchen line or the dishwasher is set at incorrect water pressure setting and does not collect enough water based on the flow time of inlet valve. If you hear the wash motor cut in then there is not enough water in the base to start pumping it to through the arms.
It is possible that the machine does not start off the cycle because there are errors or feedback from the inputs. For the program to start up the main program controller must initiate the INLET/PUMP MOTOR/DRAINto work when it is commanded .If this does not happen then the voltage at these pointsmust be checked or the fault relates to no voltage/drive from the controller. This means the controller is a suspect.
If the water flows then the flow should be good, if not the inlet valve is bad or there is dirt in the filter. Also check the flow at the inlet of the water line. What is most important for the motor to start functioning is that the door switch must be ON when the door is shut or this will be an error for starting the motor. The water pressure must be good and the spraying must be seen to be good. If there is low pumping or pressure then the spray arms will not turn around to inject with pressure.If so the pump must be checked for clogging.
Ok this normally happens when there is a leak in the base pull it out and remove both side panels Do you see any water in the base look on the left side there is a red bar which goes down to the botton lift this up and down you should hear the swich clicking make sure the rod is down then retry it
The micro screen maybe clogged but the main culprit may be the larger filter found inside the unit upon which the spray arm sits. It has sometimes significant calcium type deposits that I nearly completely cut off the water flow.
Water comes into the dishwasher not through the spray arm. It comes through the water inlet valve out of the hole on the left side of the tub. The lack of the pressure could be if it is not enough water came into the dishwasher during the fill up time. Add a 1/2 of gallon of water manually and see how the spray arm spins. If it spins better then the next step is to check the water shut off valve under the sink. Is it open all the way or not? If it's fine then the problem is the water inlet valve. It could be blocked with hard water deposits or it's not opening all the way. In both cases it has to be replaced.
Check first that no debris is blocking the holes in the spray arm where the water comes out, and clean out the holes.
In case it will not solve your problem, it's look like a pump problem (the pump has two functions : drive water to the spray arms and to drain water out the washer).
Open the rear panel and listen if the pump works during the wash cycle. In case it doesn't work, it should be replaced.
Good luck !