Have you inspected your ducting to be sure it isn't crushed, misrouted or disconnected?
There's plenty of posts about that.
You might want to consider an alternate propane sourced heater like Mr. Buddy.
There are lots of posts about them and you'll get MANY OPINIONS about them being used inside but they really are safe if used correctly.
Just remember, your R/V has relatively thin walls and little insulation. Even R/Vs touted as 4 season are not really. Cold eats up LP and battery quickly. Cold also produces lots of interior moisture, even from just breathing. Always vent the interior regardless of heat source.
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2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2024 Ford F-Series SCREW•7.3L•4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
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