I have a good amount of heat into the bedroom and bath. However, there is very little heat coming out of the heat vents in the living room on my 305re. There is a little heat out of the vent at the end of the island; however there is no heat from any of the 4 vents under the cabinets where the wine rack is located. Are these just cold air vents? Also, there is little heat from the vent on the stairs leading into the bedroom. Any thoughts? Unit is under warranty, but I would prefer to not pull it to the dealer if not necessary.