You were absolutely correct. Many thanks.
I had discounted a blockage because the filter was clear and the manual says that lights 2 & 4 flash for this error!
It turned out that there was a blockage where the hose joined my sink trap.
Obviously the manual is not a great deal of help, do...
Hi can anyone advise what lights 2&3 flashing on a DI450 mean?
I have had this error in the past and a reset has cleared it. However it now happens a few minutes into every attempted wash cycle.