Gas furnace on a Goodman unit. The board is reading pressure switch is stuck open. What does this mean? If its an easy fix, please post pictures.

Search You Tube for a complete video and explanation of your problem. You may be able to clean the tube to the switch or the intake port at no cost. Common start up problem after using the AC. This is the small vacuum/pressure switch connected by tube to the inducer fan. Remove the top and it is easy to see.