Top dishes not getting clean

I would check for a water flow blockage in the pipes.

It is likely that sufficient water is not coming from the top arm. These dishwashers oscillate the water flow between top and bottoms sprays alternatively. This ensures water is pumped with adequate force. It is possible this mechanism is not working correctly. The device called check ball item 58 in this diagram actually does this function. The ball might be out of shape or not sitting properly causing incorrect wash water movement.

http://www.searspartsdirect.com/partsdirect/part-model/Frigidaire-Parts/Dishwasher-Parts/Model-FDB1050REC0/1428/0130000/R0505129/00004?blt=06&prst=&shdMod=

First try running a cycle of "Dishwasher Magic". You can find this at Walmart for around 5 bucks. This will clean and condition the inside of the dishwasher and the inside of the pump and motor.
If this doesnt help...and the plastic and/or metal components in the dishwasher seem to look and feel intact..this would lead me to believe there is an issue with the pump and motor. These are sold as 1 unit or as seperate units depending on the model. Changing it is simple if you know how to dissconnect and reconnect a dishwasher. Take into consideration the age of the unit, the cost of the part, and the cost of a total replacement.

Hi port838,

This is usually a sign of too little Rinse Aid.

Also,

Please follow my Tip below on some hints on how to keep your Dishwasher in tip-top shape:

DISHWASHER NOT CLEANING PROPERLY ANYMORE...

Kind Regards

JEDEMEYER1

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Hi

If the top rack of the dishwasher doesn't get clean, check your appliance to see if you can fix the problem.
First check the spray Arms to make sure the holes in the spray arms are free and clear of debris. Your dishwasher should have several spray arms, including one at the bottom of the tub, one under the top rack, and possibly a third spray arm on the top of the tub. Sometimes food and mineral deposits can block holes in the spray arms, preventing water from spraying effectively. If this occurs, warm some white vinegar and pour it into a spray bottle. Spray the holes with the vinegar and dislodge debris with a toothpick or large safety pin.

Then check to see if your dishwasher has clogged filters. Filters generally cover the drain valve area to catch debris as the water drains from the dishwasher. Many dishwashers have maintenance-free filters, but your dishwasher may have filters that need cleaning. Read your owner's manual before you perform any filter maintenance to avoid damaging your dishwasher.

Check your water temperature to make sure it's hot enough. Water that is under 120 degrees Fahrenheit may not be hot enough to clean dishes effectively. Turn your kitchen hot water tap on and wait until the water warms up completely. Fill a cup and measure the water temperature with a kitchen thermometer. If the water is less than 120 degrees Fahrenheit, turn your water heater up to 120 degrees.

Load the top rack properly. Place cups and bowls upside down in the rack and don't nest dishes because this can prevent water from reaching dishes. Don't overload the top rack. Instead, position each item so the dirty areas of the dishes will receive full contact with water spraying up from the main spray arm located beneath the top rack. Prevent items from hanging below the top rack, which could prevent the spray arm from rotating.

Also check this link for more helpful info:-

http://www.ehow.com/info_7977311_top-dishwasher-not-getting-clean.html

Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com

your top spray arm is blocked and not rotating,remove it from top basket and thoroughly clean it paying particular attention to the holes right at the ends these are angled to drive the arms round if they block up the arms will not rotate.

It may be the way you load your dishwasher.
The best way to load it is bowls and small items in front, larger plates in the rear.

I'm having the same problem. Did some testing and found that the sprayer on the top rack is not even moving and hence not getting any water. Not sure what to do.

Yes, run an empty load with 1/4 cup vinegar. It sounds like there is mineral build up in the arm. Try to take the arm apart that supplies water to the top rack of the dishwasher. You can soak this in vinegar water once removed.

spin the top rotary arm to make sure it spins freely also take it off to see if its blocked (run it under tap) check all other filters too and when you load dishes make sure they do not obstuct top rotary arm if none of this works then it's time for an engineer im affraid good luck