I have a 2019 Miramar 35.2. Only 1 of our ducts were connected. Found it out the same way. Ran the heat and the bedroom got very hot while the rest of the rv was cool. We took off the access panel only to see the ducts just laying in the empty space. We were able to connect up the duct for the bathroom and cut a hole out for the round register in the bedroom. We also re did the one for up in the cockpit since it was half off. That's when we found out
Thor does not glue down the flooring. We got a nice raised floor for a short time before the air pressure blew out all of the debris from inside the duct all over the front seats. Told Thor about it but never heard back from them or the dealer. We fixed it by our self. I know it should have been caught by somebody at the factory, all in all no biggie. Just bad quality control on their part.
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