AO Smith Vertex GPHE-50 Popping Noises
by Kevin Blauwkamp
I had a Vertex GPHE-50 water heater installed almost three years ago (December of 2010). I initially loved the machine, it was quieter than the previous AO Smith PowerShot machine for blower noise and helped reduce the gas bill, with three teenagers living home.
However, over the past few months it has been waking my wife and I up during the night with strange noises and sounds. Everytime it runs it generates a series of popping noises coming from within the tank. As the unit heats up the noise seems to get more pronounced. I tried to attached a video clip, but this website only allows pictures.
My plumber suggested I drain the tank, which I did per the manual. I assumed I would be draining 50gallons of water and that I might see some sediment, but it didn't seem like that much water and I didn't see any sediment drain out. Am I missing something here? When I refilled the tank and turned it back on the popping sounds were actually worse. The unit now sounds like a popcorn machine everytime it runs. I'm really bummed out about this because initially everything was fine, but now I can't stay asleep at night.
Any help and suggestions would be greatly appreciated.