How to safely remove ceiling panel

[Grandpawlee]

I want to take down a ceiling panel to check the baffle in my LR ducted AC unit. The dealership fixed the BR baffle but it was easily accessible through the plenum. I have taped all the ducts with HVAC tape and that helped the air flow but the two ducts closest to the back are still wimpy. There us no plenum in the LR so to check the baffle I either remove the AC unit from the roof or take down a ceiling panel! I am also thinking about cutting a hole in the ceiling and installing a plenum kit like the one in the BR. Obviously I am not impressed with Jayco’s “whisper quiet” (next to worthless) AC system

[ALJO]

First of all Jayco installs according to the AC manufacturer's options. So for the quietness blame the AC manufacturer. You can check your plenum with a camera for any obstructions.

[Grandpawlee]

There is NO plenum in the living room. It only has 4 ducts. Two have good volume now but not the most important ones. Jayco should have checked the operation of the AC before it left the factory. The flopping baffle issue is so common it is almost chronic with these ducted Colemans. I could have it checked out under warranty but the dealer didn’t do that great of a job with the bedroom AC.
SOOO... Back to the problem: Should I remove the AC unit from the roof or remove the ceiling panel?

[norty1]

If me, I would attack it from the top first. Hopefully with a light and/ or camera it will be something easy to correct. Ripping into the inside ceiling may leave a mark that you would be forced to add the inside plenum.

[RedHorse1]

Another option would be to buy an endoscope. They can be found on Amazon. I got one a couple years ago mostly because I wanted one and have used it a couple of times trying to fish a wire or figure out how something is attached. It would probably work pretty well on the ducts too.