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kswalsh wrote:
The fan on my roof mount unit runs continuously, also. I can hear the compressor cycle on and off with the temperature. I think that's as it was designed.

Thanks! I never really knew for sure, and never remembered to ask when I stopped in there now and then. 
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Needing to replace the original roof top ac unit on our 2018 189r.  The original AC is a Dometic and as others have said, is very noisy.  Does anyone have a recommendation for a quiet roof top ac unit?
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