Mike, notice my figures quoted are in F not C. On Whites and Towels (with a heavy load), once the 112F is reached, the heater turns off and does not come back on, regardless of how much the water temperature decreases. And with my water heater set at 120 or so, for a large load of towels with a lot of hot water added for the wash, 112F is reached between 5 & 10 minutes after fill is complete. I've only been able to get up to between 147 & 151 on Sanitize with a large load of towels and Allergen is maybe 4-5 degrees higher. The respective heater thermostat cut off for the two cycles is 158F and 163-165F. Most of my usual daily laundry is fine in the new machine. But my most challenging loads have ended up requiring some button pushing to get the results the Duet gave me due to better time adjustment for large loads as well as a true steam generator period after wash water was drained and up to 26 minutes of steaming that really raised wash tub environment temperatures. But it's also a problem in Europe with eco60 cycles that don't reach the temperature they are supposed to because of programmed energy requirements. I am very thankful for a machine that allows me to have some control over hot water temps (and even some warm too) rather than accepting the dumbed down energy star requirements. I won't use warm on Normal, 86F I don't even consider warm. If I want somewhat of a warm, I'll use PP. If I want an old-fashioned warm of 95-104F, I select hot on Normal.
