Insulation in Ceiling

[Wmass camper]

Does anyone know if our 330rl 2019 MHC model has a fiberglass batted roof?
And do we have a racetrack AC duct system? We are trying to troubleshoot
and rectify a water problem in the back living room roof which potentially is coming through the AC duct system.

[Mikendebbie]

Below is a screen shot from youtube video Home with The Hoopers - Keystone Montana Factory tour (at about the 11:00 mark). You also have the racetrack ductwork that you can see in this screen shot.

https://www.keystonerv.com/keystone-...s-factory-tour

[Daryles]

In the files section is a TSB by Dometic regarding the condensation drain holes in the rooftop unit.
Some units were installed incorrectly causing the drain holes to be blocked and water entering the duct work.

[Wmass camper]

what files section? What is TSB?

[Carl n Susan]

Originally Posted by Wmass camper

what files section?

Near the top of the page in the 2nd, smaller brown ribbon is the link to the Files section where various manuals are stored. In the following pic, it is just to the right of the circled "User CP"

What is TSB?

Technical Support Bulletin - Lippert has a bunch of them about various subjects relating to their products. Here is a link to a favorite one for hydraulic Level Up users.
https://support.lci1.com/documents/t...raulic-systems

[Moondragon]

A bad or pinched seal on the rear A/C will also cause the same problem. During a storm, water will gush in through the street side air return duct in front of the TV. Aaaand, the roof will quickly rot out. You can no longer peel/patch/recover with these membranes, it requires full roof replacement @ $9300 (for a 331rl). Flexarmor is a couple of thousand less.

[Grampa]

had same problem, they put a new gasket under air condition, also after that they never sealed the Styrofoam that covered the compressor, so that took care of water leak out of return for air conditioning

[Wmass camper]

DH diagnosed the problem. Removed Styrofoam shroud and found sawdust and Styrofoam pellets blocking the drain trays causing the water from the coil to back up into the return air duct work. Cleaned it out. Solved the problem.