Product review (5 stars): Typical EFC Lori an element on the water heater that goes bad first. To replace the heating element fresh cut ...
Not much to it,  it did the job.  I live in a condo and I noticed there wasn't enough  hot  water.  Many people have been getting  new water heaters, but instead of  replacing the unit I decided to troubleshoot the problem. All you need to test your water heater is an OHM meter. Air many videos on YouTube to show you how to do this. Typical EFC Lori an element on the water heater that goes bad first.

To replace the heating element fresh cut off the electric power to the water heater. Then drain the water heater. Remove the old element using a special water heater element socket, and screw in the new one.  FI'll the tank turn on the power and it's fixed,  It's  a lot less time, money and hassle than replacing the water heater.