[retiredguy123]

Originally Posted by Toymeister

If you are really into this you can test the resistance of the elements to see if they need to be replaced. And yes, before someone accuses you of losing all common sense the first line of instruction says shut off the power. How to Check Heating Elements in Hot Water Heaters | Home Guides | SF Gate

I agree, but if you have a bad heating element, buy a new water heater. 15 years is past it's life expectancy.