The output of those should be 130 degrees since I believe they have a thermostatically controlled mixing valve. If your getting higher than 130 degrees at the faucet then you may have a warranty issue regarding the mixing valve.
I have owned a 2101DS and currently a 2250DS. Neither one had a water heater with the mixing valve that you talked about, just a 140 degree thermostat.
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Ken and Joyce
2017 RAM 1500 Lone Star Quad Cab 5.7 Hemi, 8 speed, 3.21, Tekonsha P3
2018 Winnebago Minnie 2250DS, Haloview MC7108
I've installed the adjustable thermostat and it's working well. Installation didn't go smoothly and I had to do some modification to the bracket holding the thermostat, and spring, onto the tank. The two legs of the bracket were too long and I thought I could bend them but the metal broke when I attempted bending. I ended up drilling three small holes in the circular part of the bracket as well as three corresponding holes in the sheet metal of the HW heater cover. I then used aircraft stainless steel safety wire to attach the bracket to the water heater housing. All looks good.
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2021 Micro Minnie 1708FB
2014 Tundra DC
Very good advice NeilV. The hot water temp in my brand new less than a week old Micro Minnie 2108FBS is 167 degrees F! Tested with a digital temp prob. As NeilV suggested, I suspect the mixing valve is the problem as well.