The recommended temperature setting is between 115 degrees and 120 degrees. Most hot water heaters have a A-B-C knob. Here is what temperature each . the water heater, as well as the warnings printed in this manual. Failure to do so can . HOTTER. Temperature Setting for. 160°F Thermostat. Display. ▽ A B C. Burns on Adult Skin . Gas detectors are recommended in LP. & natural gas . 2010. 4. 17. – I have a Rheem RP180 hot water tank. . 140F is probably the highest you should go and wastes more energy – wrap the tank in blankets if possible. . It has dots, then A B C and “Very Hot” so mine is set to B. I had it set to C . 2017. 10. 11. – For instance, the water heater settings abc. . Based on the Department of Energy in US, the best temperature setting which you should choose . 2017. 2. 9. – Learn about the different types of water heaters and how to adjust the . There are also tankless water heaters that heat water on demand. 2013. 11. 15. – Getting Legionnaires’ disease—a type of pneumonia carried by stagnant water. Avoid both by setting your water heater to just the right . 2012. 6. 4. – Give it some time so that the water reaches maximum heat. . if you’ve never adjusted the temperature on your hot water heater, it’s probably .