I've done that (after removal at exit end - ie, sink trap end, re my question - but no result); there is no result (ie, no water appears during what I assume is the drain period); at this time it sounds like something (the drain pump?) is running
OK, but can you give guideline as to how to access appliance end of drain hose (it disappears into lower back)
OK have submitted rating (Good Service) but will try your recommendation later to see if that clears the problem. I guess this channel will stay open until success is achieved?
From the sink trap end, I inserted a piece of coaxial cable (being nice & semi-rigid) down the extension tube of the drain tube. About 1/2 way down (ca 50 cm) there was something blocking the pipe that wouldn't move. I changed-over to an unbent wire coathanger - having looped the end - and slowly extraced the blockage of hard fat. As it was the extension, I removed it and washed out with hot water until clear. Now about 30mins into a 'hot wash' cycle so it looks to be OK.
Thanks for your help. Please leave channel open for a couple of hours, though!