Since I feel very comfortable knowing that most of us do not know all things, I am used to just going for the info I can find online as it tends to be more reliable.
There may be somebody come along who knows that AC well enough to spot exactly what the red light means but in the meantime, I would go for looking on the unit for a tag that gives me the brand and model to use to search for the repair/owners manual for that exact unit.
Then when I get into wanting to look at an item but not knowingwhere or what that item may look like, the parts catalog has some good info for ID of those parts on page 198 of this manual:
https://www.winnebago.com/Files/File...01/1wfg37g.pdf
Sorry, the best I can do is referr you to somebody who might know more!!!
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!