Diverter valve is not spinning

Thanks for the reply and thanks a lot for the schematics.

I have checked the voltage on two leads that supply voltage to the diverter motor. and I got only 10V. I did not measure the voltage on those leads while they were connected to the motor.

Like people suggest using directly 120V from the outlet to test the motor. I measured how much voltage is supplied by the dishwasher when it is running and I got only 10V.

It sounds like it could be a control board problem if it does not deliver full 120V AC. :(

@valentynrepair

You could try testing the voltage at the control board points as shown in the schematic.

P4/2 and P10/1 should have the full 120V AC on it as this is the side that the active power supply is.

If p4/2 is OK but not P10/1 it may be a faulty harness connector e.g. corroded, loose etc and this is causing the voltage drop

Thanks for the information.

I was just curious what is the purpose of the diverter valve and what will happen if I do not use it at all. I can remove the disk that is rotated by the diverter valve. Now, water will go to both arms, though with lower pressure, but based on my observations so far pressure it enough to reach dishes and wash them.

@valentynrepair

The diverter valve is used to direct the water either to the spray arms or to the drain i.e. it blocks off one direction or the other depending at what stage of the cycle it is.

You don't want the water to be draining when you're trying to wash.

The circulation pump (wash pump) should pump with enough pressure to ensure that the spray arms rotate. It is the water pressure that makes them turn.

Place both of the spray arms in a remembered position i.e. side to side or back to front, start the dishwasher and let it fill. Allow it to wash for a minute or so then open the door and check if the arms have moved.

This dishwasher has two diverter valves. One is used to direct the water either to the spray arms or to the drain. The second diverter valve directs water to the bottom spray arm or the top one. Here is how it works. There is a chamber with one input and two outputs. Inside this chamber, there is a disk with a hole. The disk spins, which is how this diverter selects where to send water: lower arm or upper arm. It is a mystery to me what is the real purpose of this diverter valve. I have taken out the disk and now water goes into both arms at the same time. The dishes are as clean as before the diverter broke.