"BMac3220".....Look for the black A/C box on the passenger side of the firewall (exterior). Hopefully, you can access it from the hood, but may need to be accessed from the right front wheel well. Look for a small black hose coming out the bottom of the box. You might try something like a pipe cleaner to clean the hose. If you can clean out that hose, it should solve your issue.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor