Sounds like your furnace is located roughly same place as mine right below the Bedroom and Bathroom registers. I have also considered installing registers with dampers in select areas. They are posts out there cautioning restricting air flow in these RV furnaces so I wanted to take small steps into this. Although some have done it with no reported problems. As a start/test I purchased a couple sheets of magnetic material like for frig stickers and cut out rectangles to cover the registers. I thought even when furnace was not in use these would keep stuff out of them. Worked fine for that. As for as regulating airflow, the Bedroom and Bathroom pieces would be lifted up during furnace operation. Covered registers down stream from the furnace stay flat even when totally covered. Not very technical but used my slippers to hold down the magnetic rectangles in the Bathroom and Bedroom
By the way have not noticed any erratic furnace operation but then again never tried closing them all off at same time nor have I used them more than one season. I was also trying to divert as much heated air to our sole 2" duct going to the garage
Still considering installing registers with dampers in the Bathroom and Bedroom.
Not sure how the Alpine is wired from factory with coax, On my Raptor the satellite external connector is only a straight run to behind the main TV, where as the cable external connector is a feed to another coax connection behind the main TV along with the other two coax connectors in the rig. In this coax layout is also the external antenna and amplifier (booster switch). As we know that booster must be off when not using the external over the air antenna.
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2013 RAPTOR 300MP w/Rear Patio Deck NO Folding Side Ladder
2013 Silverado 3500HD LTZ CC LB 4X4 DRW
Duramax 6.6L Turbo Diesel; Allison Trans
Reese 20K; Carlisle Radial Trail RH/HD; TPMS (12 Tires)
Veteran
PSU (GO LIONS)