HighSpeedAluminum wrote:
Would that work if it was on a bench and then not work if it was in the rv for some reason? Like If the exhaust ducting was not aligned properly?
In a word, "yes". A restricted air flow path will cause the airflow switch to either not work at all, or be intermittent. It is even possible that the sail switch is not installed correctly (at the factory) or may even be bent. Take a close look at this picture. You will see the switch, and the flat piece of metal that is the sail. It is designed to catch the airflow. If it is bent or not installed correctly, it will not work properly.