What does it mean when the display shows 'r' as an error message?
The error code 'r' displayed on the WAT28400UC indicates that the cold water tap has not been turned on. The solution is simply to turn on the cold water tap. Check that the water supply hoses are also not kinked or pinched, which could restrict water flow. (Page 37)
From the official Bosch WAT28400UC Front-Load Washing Machine manual, page 37
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