You need to add a thermometer to the tank. Once you have a reading of the water temperature, compare it to your home's temperature. If it is higher, but not within our range of 76-80 degrees, then you may have a heater issue. If it is less than the home's temperature, that would be a thermometer issue. It should fall within the range of 76-80 degrees if the heater is working right. Don't get hung up on the light, as all it tells you is that the heater is receiving electricity, basically.
Date published: 2018-10-11