The temperature should be consistent. Most electric water heaters have two heating elements. You can remove the two metal plates on the water heater and adjust the temperature with a screw driver. Both elements should be set on the same temperature. I think the builder sets the temperature at 120 degrees, but I increased mine to 125. Be careful when you remove the metal plates because the edges are sharp. It could be that one of the elements is not working, which may provide an inconsistent temperature.
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