Atwood water heater humming noise
I have a 2004 Holiday Rambler Presidential 5 th wheel rv. It has a six gallon propane/electric water heater. We just opened camp for the season and we noticed a humming sound (like a small motor runni...
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It is the electric element, it gets built up mineral deposits, (white crude) take it out and either clean it good or replace it. While it is out you just as well replace it.
