Winter is here and my garage door does not stay closed

my craftsman 1/2 hp garage door closes and opens fine. However, when i close the door via remote or the wall panel, the door goes down, hits the floor for a few seconds, and then comes back up.

Here is a video that may explain better: https://youtu.be/F5DQLjm5dxA

I’ve gone through the forums and have checked the following:

1. checked the 2 censors to make sure they are aligned and the green light is on,.
2. I’ve cleaned everything around the sensors it to make sure there is no obstruction.
3. I have also unplugged and plugged in the power to the motor
4. I’ve played around with the up and down tension adjustments in the back
5. I’ve tried holding the wall button to by-pass the sensor. The door still doesn’t stay down. Which makes me wonder if the issue is with the motor unit?

I called a couple of repair guys and they both quoted me $150 to come check it out. I am hoping someone here can help from having this unexpected expense.