temp of leads begins its exponential rise again (caught it at 12K), approx 
11 hours after last reset.  this time asked operator to shut off valve for 
3 seconds, then turn back on. 

previous recycle, asked operator to shut off valve for two seconds ... and 
the warm up time was 11 hours.

previous^2 recyle, asked operator to shut off valve for 1 second ... and 
the warm up time was only 4 hours. 

Syd