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Hello, my name is ***** ***** I look forward to helping you. Are we talking about a heat pump water heater?
Excellent, When was it installed?
No issues until now?
Okay, being that I am not there I would error on the side of caution. You are still under warranty, so I suggest you use it. First does the smell and noise come from the top? Where the heat pump itself is?
That's really strange. The tank portion is just like a standard electric water heater. It shouldn't hum. There's no source for it to hum unless you have a recirculation pump down there. Can you upload some pictures of the install. first from a distance so i can see it all
Ok, that makes more sense. Are you able to take pictures?
click on the paper clip above where you type
Are you still there?
Would you like help over the phone?
I suggest running it in electric only mode until you can get it serviced
Are you still needing assistance or should I close this question?