Other members with similar and different units have had the same problem --- little or no heat getting to the upper bedroom area.
Some steps that have been taken to rectify this issue are:
1) ensuring that your ductwork leading from the furnace to the bedroom is clear. All sorts of things have been found in the ducts -- workmen's tools, lunches, Coke cans, etc., You can use a vacuum with the Blow feature or Suction.
2) check for kinks and right-angled bends in the ductwork. Some have rerouted the ductwork to avoid too many 90 degree elbows,
3) some have replaced the aluminum dryer-type duct with rigid ducting.
4) ensure that any joints are taped properly. Use aluminum-type tape to go over any loose-fitting or open joins.
5) make sure the outlet vents at your furnace are open where they should be and closed where they should be. Some have found that all the furnace outlets were open and hot air was blowing into an empty space in and around the furnace.
6) replace your existing floor vents in the living/dining area with ones that have adjustable louvres - that can be closed, if necessary, to direct air "further on down the line" into the bedroom area.
Hope this helps somewhat.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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