A/C Low Flow of Cold Air

[Cooter]

We are not new to 5th wheels or camping. It is our first year full time.
We recently purchased a used 2017 379RD and love it. Has anyone experienced the rear a/c unit with it not pushing out as good flow of cool air? I checked the ceiling vents, the foam filters where the inside air is drawn through. I pulled the cover off of the unit for inspection. The only thing obvious was the squirrel cage vains, they were loaded with lots of caked on dust. I removed the squirrel cage and thoroughly it. After reassembly there was an increase in cold air flow, but it still doesn't seem that it cools. I understand that this a/c is a whisper quiet unit.

[AZ Traveler]

A lot of folks had issues with ducts collapsing on 17 & 18 models. Use the search function to find some of those threads.

[Mudchief]

The return to the AC are closing. Most people put a 1.5 inch plastic pipe in the center to keep it open. Cut a pipe about 11 inches long and remove the vents and push it in the return to the AC. Put it in center of the return. Do both vents.

[Cooter]

I will definitely do that
Thanks

[fatcatzzz]

Also check the tape between the duct and the ceiling. On mine I had to redo everyone of the discharge vent. Some taped poorly, some had no tape at all. All work great now.

[DQDick]

One more thing to do after you've done all of the above is cut 1/2 of the slats off your return air ducts and shorten the vent assembly so it doesn't stick up into the ducts. And, of course, remember to keep your filters clean.

[Cooter]

Thanks for all the tips
Can you send me a picture of your return vents
And I don't quite understand the vents
Fix you described.
Thanks