Installed 4/11/2018 have had trouble keeping the pilot light on. Called customer service and tech rep stated main problem was probably poor draft or inadequate ventilation. On 4/20/2019 water heater completely stopped working. Could not keep the pilot light on. 4/23/2018 plumber checked out the system. Needs a thermostat control. To get the new item, I was told I had to pay shipping. hoping this new part solves the problem.