Error code E11 on a Blomberg washing machine indicates a problem with the water supply. Follow these steps to resolve the issue:
1. Check if the water supply is turned on. If not, turn it on.
2. Inspect the water inlet hose for any kinks or blockages. If any are found, straighten the hose or remove the blockage.
3. Verify if the water pressure is enough for the machine to operate. If the water pressure is too low, you might need to contact your water supplier.
4. If the error still persists, there might be an issue with the inlet valve or the machine's control board. It's recommended to contact a professional technician for further assistance.