my 5th wheel has two AC units. Zone one works fine. Zone two does not cut on. I don't even get the option to turn it on when I cycle through the zone button. All worked fine two weeks ago. Any words of wisdom and experience will help.
Was the second A/C added on after manufacture? If so it may not be part of the zone options. It may need to be controlled directly from the unit itself in the bedroom ceiling.
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Ed
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2015 Rockwood 8289WS
2009 Ford F-250