Re: WMA30
Not seen that fault. Have you actually watched it do this? Suprising how many times people say this, even when they have had the machine for years, guess it is a sign of the times with people having so little patience. I sit and watch it and in most cases the machine works perfectly. Possibly worth checking the sump to make sure something is not partially blocking the pressure chamber part.
Other than that you may need to experiment unless someone else has seen this before. 😉