High pitched whining noise from bottom of dishwasher

Error 20 is not a listed error in Baumatic dishwasher. They only mention E1 to E7.

There is a reset procedure for random errors which can be viewed at this page.


http://www.ukwhitegoods.co.uk/help/fault-codes/dishwasher-fault-codes/3305-baumatic-bdw-dishwasher-fault-codes.html

Please check if this helps.

A loud high pitch whine while running the dishwasher means that there is something caught in the chopper assembly. To get to the chopper assembly you need to take the racks out and take the pump apart from the inside of the dishwasher. The chopper assembly looks like a metal grate with holes in it. And it might not even be stuck in the grate but somewhere in the pump area due to the water being pumped out, so the best idea is to take the whole thing apart and clean everywhere. However I do not recommend doing this unless you are completely certain you will remember where the screws and gaskets go, otherwise you risk damaging your pump or house from a leak or improper installation. You have been warned.
Here is Manual onlineManual online

I have Baumatic BDW 2W Dishwasher The programming controller stops rotating after the first normal cycle revolution. can you advise please.

Maybe a stretched transfer case chain.
I wouldn't rule out some trans issues
Got the correct fluid in transfer or proper level
The clunk sounds like ,U-joints
Check all the mounts on everything,trans, transfer.etc

Searched for a nylon rope guide for a Baumatic BDW 9 but was unable to locate one. I found that many of the components for the BDW 9 also fitted the BDW 10. So I searched for the rope guide for a BDW 10 and found the correct product. Problem solved!

You better to check the color wheel or Lamp ballast.

Normally, the noise comes from color wheel.

debris caught iside pump assy is what it sounds like

How deep do you want to get into this?It sounds like the wash pump motor bearings that are worn.You can pull the unit out flip it over and wd40 the bearings in the motor or you can replace the bearings.Try to lube them first.

A loud high pitch whine while running the dishwasher means that there is something caught in the chopper assembly. To get to the chopper assembly you need to take the racks out and take the pump apart from the inside of the dishwasher. The chopper assembly looks like a metal grate with holes in it. And it might not even be stuck in the grate but somewhere in the pump area due to the water being pumped out, so the best idea is to take the whole thing apart and clean everywhere. However I do not recommend doing this unless you are completely certain you will remember where the screws and gaskets go, otherwise you risk damaging your pump or house from a leak or improper installation. You have been warned.

Suggestion: Try some anti-squeek on the belt, or some soap. Plug off the wall first.