Fred Bloggs wrote:

Well- let's see if all is well- you have the means to make a scientific
determination. You will need a wattmeter and hour run meter. The steady
state run power should be something like 300W or less, and the long term
average duty will be below 30%. Check Bob Pease's site at NS for a great
wattmeter design:-)

I think I'll settle for the occasional pair of temp measurements
thanks Fred! Even gaining access to its mains supply means either a
lot of grunt work shifting adjacent dishwasher then the unit itself,
or dismantling wall-mounted switch. Pretty satisfied it was the cause
described up-thread.

--
Terry Pinnell
Hobbyist, West Sussex, UK