The dryer wouldn't start

I noticed the door switch handle was flopping back and forth--no longer was tight. I popped the top up and took out the screws holding the dryer vent to the top of the dryer, so I could put the top back out of the way. I disconnected the switch wiring harness which was on the top, right of the dryer sticking through to the dryer door. I pushed down on the tab that was holding the switch tight to the wiring harness. I wrote down the model number of the dryer and the part number. I ordered the part from partselect.com--this was the easiest part of the whole process! I thought initially I would not be able to find the identical switch I needed for the old dryer that I have. It took a couple of days to get the switch in the mail. I put the new switch in the same position as the old one was. I put the screws back in the dryer vent, popped down the top of the dryer, and plugged it back in. (I had already cleaned the dryer duct work--thought that might be why the dryer didn't start. Glad I cleaned the duct, but the cleaning did not fix the problem of getting the dryer started.