Thanks...the test programme worked fine and did not indicate any errors. It took a couple of minutes to fill, rotate, drain, spin and then stopped as if at the end of a normal programme.
I ran an empty 90 degree wash soon after - I checked the glass every 5 minutes and it was stone cold. No idea what's happening. I've got to assume it's working OK, but I've definitely felt the glass get hot before.
Thanks for your help