Okay, that gives some really good clues! Two things you are telling are important as we now know the fire is lit and the blower is running. One vent giving only slight heat and the other none, tells me the ductwork from the furnace is dropping off and almost all the heated air is blowing out around under the floor, etc, instead of staying in the ducts and coming inside.
One quick guess would be that there are two flex ducts and they may have fallen off what passes as a phlenum on RV furnaces. One possible way to test this and see if you might locatewhere this is going on, is to look /feel for extra warm spots like cabinets, etc which should NOT be heated!
If the furnace is running but the RV is not as warm as the front of one cabinet, that is a good place to look under that cabinet! Also if you pull a drawer out and lots of warm air comes out, look there? Or it may be as hard as getting down to the furnace back itself to put it back together. Bummer....
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!
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