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1. The spray arm has an aluminum piece on the bottom side of the spray arm. It kinda separates away from the plastic arm and as the spray arm turns, it hits the inner door liner. You can see the scrape marks it makes on the door liner. You can bend the aluminum edge upwards with needle nose pliers or try to make it tight to the plastic spray arm by pushing on he tabs.
2. If you have removed the spray arm make sure the thin silver washer is still inside the hole were the spray arm inserts use a flashlight and look inside that section. If missing, it can also make a noise.
The spray arms can usually be removed by unscrewing (clockwise or counter clockwise depending on brand and model), or squeezing a retainer to release the arm. Before removing the spray arm, place the spray arms (all) in a specific position and activate the dishwasher for a few seconds with wash action. Then examine the position of the spray arms to determine if there was movement from the spray arms. If not, then the spray arm(s) are probably clogged and restricting water flow (which makes them turn). Make certain that you are positioning the plates, glasses, etc. in the dishwasher so that they have access to the water. If still no luck, contact an appliance service company.
Yes it can get plugged. Any debris pumped up to the arm can get lodged into the tiny holes. Also, sometimes the arm itself becomes split along the joint between the lower and upper half. Remove the arm to inspect, clean, and repair/replace the arm if split. I fixed our Maytag spray arm when it split, by drilling a series of small holes along the split parts and sewing the thing back together with fairly fine copper wire. Still working great after a number of years. The small spray holes can be poked clean with a heavy needle and the arm vacuumed out. If after all this it still won't spray properly, the intake screen at the bottom of the lower spray arm tower may need to be cleaned as well. Remove components starting with the spray arm and work your way down, noting placement and orientation of each piece. Remove the screen, and soak it in hot water, detergent and white vinegar for an hour or so. Check all holes in the deck for any food plugging. Reassemble in reverse order and check the lower spray arm for plugging as well. Hope some of this helps!
sounds like the chopper is plugged or broken. remove the lower spray arm by holding tab with a set of plyers and turn spray arm counter clockwise. then where the middle spray arm attaches at the back of tub remove screw. turn the housing on pump to the right side of the machine( its easier to pull top rack out a bit so that whole housing can move) it will turn a little bit to be released from top of pump. then take out the torx screws that hold the housing and filter on. in the sump there will be one or two more smaller torx screws remove those and remove coverings to the chopper. check to see if the mesh is plugged with food and other things. clean. also check to see if blade turn with the motor impeller. if not then the chopper needs to be replaced. good luck
Top: Remove the upper tray by releasing the clips on the ends of the runners. (Squeeze the top of the clip and pull upwards). Remove the spray arm by holding the round plastic clip that holds the arm and turning the arm. It will unscrew.
Bottom: Grab spray arm in centre and pull sharply upwards to unclip.
The wash arm(spray arm) is not a tight fitting item,as for the noise the when spraying have a look at the spray arms the are a few holes on each side and top and bottom of each arm,you will need to remove the arms of possible they normally have a quik release system where you push two small fingers together and the arm releases,then inspect these holes and you will probebly find that some are blocked this cuases a uneven flow of water and thus makes the arm rotate un even and make a noise if you find there is food of sorts in these holes remove and put the arms back and that should take care of the increased noise.
Give the spray arm a spin to make sure it rotates. It should spin freely. If not, remove plastic spray arm clip, flip it over, replace it, and try again. Make sure holes in the spray arm are clear of debris. Spray arm must be clean for it to spin. If spray arm does spin freely, remove spray arm clip, spray arm and the post assy (the thing the spray arm attaches to). Try your WikiFix again. This time add baking soda to the hole the post assy came from. Top it off with white vinegar. Leave it overnight. In the morning, stick your finger down the hole where the spray arm assy sat. You should feel a plastic thing. This is a propeller attached to the recirculation pump. You need to free it up. Get that thing moving with your pinky or a chopstick or whatever. Try the machine without the spray arm. You should get water blasting up from the hole. Reassemble the spray arm.