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One of the weak links in the latest system is the lousy RJ11 connections used on telephone cable that routes hard wired signal to and from BCM to DC and up to roof to the Zone 1 and Zone 2 air conditioner control modules ...
This is the gateway for ALL HVAC commands including furnace ... with road vibrations and such many folks with this system on many makes of fifth wheels are experiencing intermittent In Command control issues with HVAC and furnace..
The RJ11 connections are cheap and vibrate just enough to loose continuity across the CANBUS hierarchy and the system won’t function properly.
A good preventative check is to remove roof AC covers and reseat these connections and apply a small amount of clear silicone RTV to hold connections in place.
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