thanks for that.
stripped out heater matrix ( damp... _ and dried with hair dryer...
Dryer was just tipped onto back - then back up = so cant see where else water can be - taken off side panels - no obvious sign of water.  Have emailed hotpoint - as their manual makes no mention of problem if tipped over...
cant see why it is trill shorting - tripping rcd.
any ideas?
looks tricky to strip down further.
What else is vulnerable at back of dryer?
                
 mikie
                
 October 2011