Need some assistance... Have an electric water heater that was replaced 70days ago. Was replaced "like for like".. meaning same unit just newer model. (same electrical requirements same connections and was even same height. So was easy swap. Flash forward 70 days and unit has a major electrical fail. Smelled burning plastic smell and water was way to hot. So now one company says original installer needs to replace because they said it may have been installed incorrectly. The original installers say it is component failure/power surge that would have caused the damage. Who is right??? I'm leaning to original installers as it worked fine for over 2 months.