Ken, absolutely wonderful. Thank you so much for posting this. for some reason, the 702 always fascinated me. The temp boost as used and did assure of 140 degree main wash. From what i discovered, the sani wash option simply turned the heating element on for every water circulation/washing/rinsing period and if anything like later Maytags, kept the heating element on longer during the dry cycle. There was no thermostatic hold for the final rinse. If thee had been, I believe there would have been a specified tempearture point like on the temp boos main wash. Because it wasn't a true sanitize/temp hold function, I pretty much decided against one of these when I endedup with the GE Postscruber 1200 in 1987.