I have a bean to cup machine miele cva 620 has been working fine until today, when it requested water tank empty. as i had filled it the day before checked and yes the tank was empty. On inspection found the what i assume is a overflow tank underneath the removable tank to be full of water. Tested the water tank by filling and leaving standing whilst i dried out the overflow tank. The removable tank is ok the valve works so preventing any water leak until fitted. Put the tank back and left standing after about an hour the overflow tank was full again
any help please
any help please
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