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The E20 error code on Bosch washing machines signifies unexpected heating during a non-heating cycle, such as the rinse cycle. This suggests the water is heating when it shouldn't be, potentially harming your clothes or causing damage to the machine.

The E19 error code on Bosch washing machines indicates a heating time exceeded issue. This means the machine is unable to reach the desired water temperature within the expected timeframe during a wash cycle

The E17 code typically indicates a water supply issue. This means water isn't entering the machine at the expected rate or volume, hindering the wash cycle.

Here's a comprehensive breakdown of potential causes and recommended actions:

This code can have different meanings depending on your specific model, but generally indicates a communication error between the control board and other components within the machine.

The E28 error code on Bosch washing machines indicates a fault with the flow sensor. This sensor monitors the water flow entering the machine and plays a crucial role in various wash cycles.

I can definitely help you with the E27 error code on Bosch washing machines. This code typically indicates a door lock issue, where the machine detects that the door is not properly closed and locked. 

This is a safety feature to prevent leaks and potential damage.

These error codes all share a common cause: a problem with the motor.

The F20 error code generally signifies unexpected heating during a non-heating cycle, like the rinse cycle. This unexpected temperature rise can be caused by several reasons

The F19 error code on Bosch Washing Machines indicates a heating time exceeded issue. This means the machine is unable to reach the desired water temperature within the expected timeframe during a wash cycle.

The F18 error code on Bosch washing machines indicates a problem with the drain pump. This means the pump is unable to drain the water from the machine efficiently during the wash cycle.