Cleaning AC ducts?
One of my off-season chores is to clean our trailers AC ducts. They have an endless source of styrofoam bits that shower the living room every time the AC is turned on after the TT has been moved. ...
Forum Discussion
Have you looked at them by pulling vent cover? Here is a mod that I have done to improve airflow, and could be the cause of your foam. I removed the vent collar and used vent tape between ceiling and duct. this improves airflow and stops debris from inside the roof.
