Hi Michael
I am afraid I haven't followed it through since then but did collect some comments from others in the forum, which I will paste below for your convenience, in case you haven't seen it already. Although there is an error code mentioned, I felt some of the symptoms discussed could influence the issues we have. Please let me know how you get on. Cheers
Err20 - clean filter or no drain fault, then check outlet, then pump faulty need torx see below
If the filter is clean then the machine is sensing that it has not completely drained in the time allowed.
check the outlet hose and the spigot on the sink trap (if it is connected to the sink trap) for blockages.
check the sump hose for foreign bodies, eg: a sock. Lean the machine back, lay down on the floor and look up under the machine.
The sump hose is a concertina type on the right side of the machine from the tub to the pump housing. If all that is clear, it may indicate a failing pump or the triac that powers it (main circuit board) problems.
I took out the pipes, pump etc looking for a block and found a button blocking a "pressure switch thingy" which was slowing the flow of water causing the error code.