First you need to know that hearing some noise from your RV's Converter is completely normal and in some cases the Converter itself will make a humming noise and sometimes the noises you are hearing may the cooling fans on the Converter that keep it at its proper operating temperature.
Unless you are hearing a very loud electrical noise or you are experiencing problems with the electrical systems in your RV you should not be concerned.
If you are still unsure you should take your Motorhome in and have a Certified RV Technician take a look at it, since it should still be under warranty.
I hope this helped.
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