Question about Frigidaire 24 in. FDB421RF Built-in Dishwasher

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Frigidaire FDB421RFS3 Dishwasher:No water sprays through top arm

Water flows through the bottom arm allowing it to spin freely and clean dishes. However while running, I observed that the top arm receives no water at all. There were no clogs in the upper arm supply tube and the motor-pump seemed to run adequately. From what I've read, the motor-pump supplies both lower and upper arms with water by intermitently operating, allowing a check ball to alternate positions between both inlets.

Any ideas on the problem and solution ?

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  • ike81 Oct 19, 2008

    Water flows through the bottom arm allowing it to spin freely and clean dishes. However while running, I observed that the top arm receives no water at all. There were no clogs in the upper arm supply tube and the motor-pump seemed to run adequately. From what I've read, the motor-pump supplies both lower and upper arms with water by intermitently operating, allowing a check ball to alternate positions between both inlets.

    Any ideas on the problem and solution ?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: water not going through spray arms

1.does motor run? no. replace motor. 2.open door and leave the bottom rack inside dw.spin the spray arm underneath the bottom rack by hand. it should spin freely without binding. if it doesnt spin freely take out the bottom rack and try again. if it does spin freely then your bottom rack is laying on your sprayarm preventing it from rotating. 3.you could also not be getting enough water into your dw.

Posted on Mar 22, 2007

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  • 1 Answer

SOURCE: water not going through spray arms

Have same problem except big motor spins independent of stripped? impeller. tried to reassemble but seems mechanical or adhesive agent misssing from one shaft or the other and the motor spins the impeller (now tight) only to have it slip off again and stop pumping water.

Posted on Feb 04, 2008

watugot
  • 290 Answers

SOURCE: dishwasher - no spray arm action

If it is filling with water properly then it sounds like the chopper screen is clogged so that water isn't getting into the pump. You can remove the top of the pump housing and get to the screen and chopper blade to inspect it. Go to sears.com, click on parts and enter your model number and you can view a diagram of the pump parts to help in disassembling it.
If the pump is not clogged then you have a problem with the impeller or motor. If this is the case you can replace the entire sump assembly just about as cheap as replacing individual parts of the pump.
Post back with any questions.
Thanks, Mike

Posted on Feb 16, 2008

  • 1 Answer

SOURCE: Dishwasher upper arm does not spray

possible ball valve problem

Posted on Jan 03, 2009

  • 423 Answers

SOURCE: Frigidaire Dishwasher - Spray Arm Not Working

When a dishwasher has been checked for obstructions in the sump area and the spray arms can spin easily (by hand) plus the spray arm holes are not blocked, you end up with either a broken impeller or a failing wash pump motor.

If you would like more details of have more questions, please post comment back here, OK?

Good Luck!

Posted on Apr 26, 2009

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1 Answer

Why are my top rack dishes not clean at all?


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=

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I have an older dishwasher also and recently my wife also complained about it not cleaning right... so me being the man I am tried in vain to clean the things... Bought new spray arms online and installed them in minutes...now the thing works like new... However I have also found that if the heating element goes bad then that also can mess things up bad... So I would buy new spray arms, and also check out the heating element to make sure it is working... Here is a tip that will help you with the online buying...


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The upper arm is free spinning by hand, but from all indications, it is not spinning. Water is flowing freely and drain is excellent. Is the upper arm problem a major repair.


Hi


Please check if something is blocked near the top spray arm, also make sure that all holes are oopen. Use a sharp metal pin to clean the holes on the top spray arm. Make sure the water pressure is not low.

under the screen and youl'll need a Torx driver to get to it after you remove the spray arm and screen. Check to see that the path it travels is clear. I have seen these get blocked up by stuff.

Now check if the top arm spins freely and check the bearings for the arm, if they are producing extra friction while the spray arm spins. Hope this helps... Please post back if you need more assistance.


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If the top rack is not getting clean, then either the spray arm holes are slightly plugged and not allowing enough water flow to the machine. The water coming from the arms also makes the arms moved in a circular direction which also helps in cleaning. Either the arm is plugged and not allowing water flow or the arm is stuck and not rotating. I would use a toothpick and clean all the holes first. Then try it. Try and spin arm by hand and make sure it spins very easy and freely. If not, replace it or dismantle it and clean it really good so there are no clogs and it can spin easily.

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Possible that the motor impeller has good particles in it, causing poor water pressure, which would be most evident on the top rack. You would have to remove the spray arm, then the filter, then the torx screws to get at impeller....unfortunately, that model of dishwasher isn't the greatest in the first place for washing, since it only has the one spray arm.

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I have a Frigidaire Ultra Quiet Plus dishwasher. The top spray arm isn't spinning during wash. The bottom spins fine and I can spin the top freely by hand. It appears there is not enough water pressure...


I may have the answer. I had what sounded to be the same problem. I found the dishes were dirty after they were cleaned, but I found there may have been a big pot lid blocking the upper arm. I decided to run the machine again, and after a bit opened the dishwasher after to make sure it was not a problem with the arm. Sure enough, the arm wasn't moving. However, I found out on the Frigidaire webpage that some models have an alternating spray cycle, where only one arm spins at any given time. After reading this I checked again, and it had moved by that time. I checked a few times more to confirm this. So it ended up it was an arm blockage after all. Hope this helped...good luck.
www.frigidaire.com/support/FAQ-Dishwasher.asp#6

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  This dishwasher does not feed water to top and bottom arms at same time.  It starts with bottom and then after awhile it switches to top and then cycles.  If water comes out arms but arms won't turn,  check all holes in arms.  It's the water spraying out these that causes arms to turn.   If arms spin freely by hand,  it's a plugged arm or holes in arm or insufficient water in tank. 
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1.does motor run? no. replace motor. 2.open door and leave the bottom rack inside dw.spin the spray arm underneath the bottom rack by hand. it should spin freely without binding. if it doesnt spin freely take out the bottom rack and try again. if it does spin freely then your bottom rack is laying on your sprayarm preventing it from rotating. 3.you could also not be getting enough water into your dw.

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