To clear any error you first find out what it means and rectify the problem, then the error will go away. To find what the error 29 is, you do a Google search for " Bosch washing machine error E29" Heaps of info comes up telling you that no water is coming in. So you need to check tap is on, hoses are not kinked or blocked for a start. After that then the inlet valve needs to be tested and test done to see if power is getting to inlet valve.
Lincoln Appliance NZ, March 2017