Sure enough, with my brain working right the thermostats on both are out of whack. A little bench-testing with a thermometer and cups of warm water showed neither will go below 87-88 degrees, even with the dial turned all the way down. I'm really disappointed in this brand and won't buy it again. I spent some extra money on these to avoid just this problem.

The only reason I have heaters in the first place is to provide stability when the house temp drops. Turns out I might well be better off without them.

Chris