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I am assuming you have a Fisher Paykel or similar double drawer dishwasher. Based on your symptoms it is very likely there is dirt or some blockage in the drain sump which needs to be cleared. If you have followed the normal procedure of cleaning filters etc, and there is no difference then you will have to take a thin rigid metal wire and run it through the channel between the rotor cavity and the drain sump. There could be a seed or a bone chip sitting there. I am assuming the pump rotor runs normal and you can hear water flow through the drain hose into outlet drain. Please provide make and model number of dishwasher for help with better diagnostic.
It may be a blocked hose. First point to check is under the sink where the thin corrugated drain hose joins the sink drain. If it is a double dish drawer there will be two hoses, one black and one white. The black hose is usually from the top drawer. They are held on by spring clamps.
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Hello Cheryl, There are a couple of possibilities. When the dishwasher drains the dirty water it is a time based function. This leads me to believe it is a blockage or partial blockage in the drain hose. Here is an example. (If your dishwasher drains into your garbage disposal) washing dishes you put scraps into the disposal and forget to turn it on after you are done. The disposal is filled with scraps this restricts the flow of dirty waterfrom the dishwasher. If the flow is restricted less water is being drained per second from the dishwasher. This is why the dishes still looked clean and there was still water in the bottom of the dishwasher. (if your dishwasher drains into a drain pipe) there is blockage or partial blockagein the dishwasher drain hose. if the sink drains slowly the blockage is in the main line Hope this helps Joe Connolly
If you are observing that the dishes are not clean, then you’ll need to follow certain steps to be sure where exactly the issue. First thing to check for is the detergent cup and spray arms. Check if the dishwasher’s spray arms are working fine and all the holes of the arms are clear. Now try using a different detergent like gel or liquid based detergent to see if it helps.
Dishes are left unclean when the dishwasher is not filling in properly or when the water pressure is low. Check for water pressure and water inlet valve. The water inlet valve if faulty will draw very little or no water. However, if you observe that water pressure is fine and there is no issue with the Fill valve then check whether the dishwasher is draining. If it’s not draining then see if the drain hose is plugged or clogged. If drain hose is fine and the dishwasher is still not draining then there is some issue with the drain pump or drain filter. To check this you’ll need to disassemble the dishwasher and trace back the drain hose to a pump, remove the drain hose from pump and clean the debris from the pump and filter. Make sure you have lots of towels as there would be a lot of water coming out from the pump.
Next thing to check if the dishwasher is draining and filling properly is water temperature. Water temperature should be between 120 and 140 F. If water is not hot enough then heating element has gone bad, to check the element you’ll need a multimeter. Use the multimeter and check if the Rx1 reading on the meter shows reading between 1200 (1.2K) ohms and 1500 (1.5K) ohms, if not the heating element has died. Please post back if more information is required.
have you check the tunnel between the kidney shaped sump and the well that the rotor motor locks into, often chips of crockery,seeds etc get caught in here and reduce the flow rate .You will need to remove the rotor motor,its easy, lift out racks then sprayarm to expose rotor motor turn locking ring to release stainless sieve lift out, then turn motor assembly anti clockwise and lift out.With something flexible eg 4mm insulated wire push it through tunnel from sump to motor well.