The spray arms in the dishwasher are not spinning.

There's a common misconception among users that dishwasher spray arms are activated by motors that spin the elements, causing the dishes to be sprayed with water. In fact, rotation is achieved by the water pressure generated by the circulation pump. The pressure in the system acts on the impellers, causing them to move. Consequently, when the pressure decreases, the spray arms in the dishwasher stop rotating. We'll discuss troubleshooting steps below.

Let's prepare well first.

Impeller failure isn't always caused by a fault in the system. A simple blockage can often be the cause. However, in any case, you'll need to access the dishwasher's body, which may require the following tools and equipment:

• Phillips and slotted screwdrivers;
• pliers (useful for loosening clamps);
• multimeter (for performing diagnostic testing of parts).

Afterwards, it's time to begin preparing the PMM itself. The procedure is as follows:

• de-energize the equipment;
• disconnect the device from the house networks;
• close the shut-off valve;
• disconnect the inlet hose and drain the remaining water into a previously prepared container;
• unfasten the drain hose and at the same time inspect its cavity for blockages;
• Attach the hose to the back wall using special fasteners.

To avoid distractions from your work, set aside a designated area for machine repairs in advance. It is best to place the equipment in the center of the room to ensure free access to the unit.

Let's check for blockages

Often, dishwasher spray arms don't spin due to clogs in the drain system. First, clear the drain and inspect the pump impeller.

Before starting work, make sure that there is no liquid left in the dishwasher tank. If there is, remove the water using the drain hose.

To access the impeller, you must:

• remove all baskets and containers for dishes from the washing chamber;
• unscrew the drain filter located at the bottom of the dishwasher;
• underneath you can find a protective mesh, which also needs to be removed and washed well;
• Use a sponge to remove all the water that has accumulated in the hole;
• Remove the protective cover by pulling it towards you.

Work on disassembling and cleaning the drainage system should be carried out using protective gloves, as blockages are often formed from broken dishware.

Once all these steps are completed, you'll have access to the pump impeller. Insert your hand into the opening and remove any accumulated debris. Once the blockage is cleared, the impeller will begin rotating again.

Repair of the circulation pump and pump

If cleaning the drain system usually solves the problem, but this time it doesn't, you should inspect the pump that creates the pressure and the drain itself. The first step is to get to the pump.

1. Carefully detach the sprayer.
2. Using a screwdriver, unscrew the bolts located at the bottom.
3. Cover the floor with an old towel or blanket.
4. Place the machine on its side.
5. Remove the bottom of the dishwasher.
6. When attaching the float to the tray, disconnect the sensor wiring;
7. Remove the electric motor wiring contacts.

The drain pump can be found on the side. Remove it from its mounting location and clean the mounting area of ​​any debris. Then, test the pump using a tester. If the multimeter confirms a faulty part, you'll need to install a new one. Then, reconnect all the connectors and wires in reverse order. This completes the replacement.

Another reason why the sprinklers aren't turning could be a broken circulation pump. Repairs in this case aren't particularly difficult. If the motor hums, the dishwasher does not turn off, and the impellers do not rotate, the problem is definitely with the motor. The procedure for diagnosing and replacing the element, if necessary, with a serviceable one includes the following steps:

• loosen the pipe clamps;
• disconnect the connectors that supply power to the part;
• Use a screwdriver to release the latches;
• carefully unscrew the mounting screw;
• loosen the fasteners of the other pipes and move them aside;
• remove the engine from the housing and test it with a multimeter;
• If a fault is detected, install a new motor.

When installing a serviceable engine, carefully ensure that all bushings are seated accurately in place.

To minimize damage to the system, regularly clear hoses and other components of debris. Restoring sprinkler operation is considered moderately difficult and can be done independently.

   

1 reader comment

1. June 1, 2023 at 1:08 AM

   Ivar:

   Not all the possible causes are listed! What if only the lower impeller isn't working? The upper impeller works throughout the entire wash cycle, there's no clogging, the filter is clean, the drain and circulation pumps are working, the machine cleans the upper basket well, and not a drop of water comes out of the lower basket. However, if you push the lower impeller, it rotates easily. What's the cause then?

   Answer