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the red s light is on . what does it mean?

the red light is on the one that looks like 2 twisdted letter s
gerry, June 2019
largely depends on the make and model, neither of whiuch you deigned to put down.
Whatever it is, you should be able to find a manual online

salkfdja;l, June 2019
link Click here to see other fixes for Bosch SMS53M02UC.