Water heater temperature setting change

Problem with Rheem 40 GAL ELEC TALL Water Heater 6YR SC 82VH402
How to change temperature setting


Link below shows step-by-step for typical tank-type gas and electric water heaters
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html

If water heater used to be hotter, look at diagrams following link:
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

Other water heater tips and tricks:
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

If you have tankless water heater, consult manual.
Changing temperature on tank-less can lead to problems.
Tankless should be DE-limed each year to maintain efficiency. U-tube search 'delime tankless'
Read the manual for yearly maintenance requirement.
All costs are energy, and tank-less are maintenance heavy.