Bosch WAT28420GB/18 Washing Machine How to Enter Test Mode & See Wash/Cycle Count

Thank you for your question regarding the Bosch WAT28420GB/18 Washing Machine and for supporting the site.

I have added videos to help you enter diagnostic mode. As there are thousands of models, please also check YouTube for instructions specific to your machine.

Diagnostic mode allows you to run tests and, on some machines, view previously recorded error codes. This can help you identify faults and maintain your machine.

PDFs with exploded diagrams are also available, and spare parts may be listed at the bottom of the page. You will receive my contact details by email if you need further assistance.