After my repair man came to fix my dryer and installed a new blower wheel, my dryer had restricted airflow, would no longer collect lint, and moisture droplets would build up in the dryer and on the glass door. I called him and he said the vent must be obstructed with lint. I cleaned out the entire vent, and it did not have much lint in it. It did have a lot of water in the silver flexible thing that connects to the vent which I did empty. Could the repair man have installed the blower wheel incorrectly which caused an obstruction to the airflow.? With the dryer running, You really cannot feel the air coming through the outside vent. The silver flexible thing is not kinked either. Thank you for any advice.

If there is no obstruction at all, it is very likely that the blower wheel could be the wrong one or, depending on the type of wheel, could have been installed backward.