7.75 years, battery replaced, now blower fan stuck on?

[haigha]

So my 7 3/4 year battery decided to give up the ghost today. I got the replacement Bosch which was matched at my local auto parts store:

Activant Cover-to-Cover

Installation went smoothly but as soon as I connected the positive lead the blower fan came on stayed on. Even after I started the car and then stopped the engine and removed the key and shut all the doors, it continued to blow.

I already replaced the FSR about two years ago.

I tried disconnecting the HVAC control module to see if it would stop. I was able to disconnect the blue and black connectors in the middle but the thick leads on the right side and the small connector on the left are proving troublesome to remove.

1. Any ideas what the problem is?

2. Can I disconnect the positive lead in the engine bay to stop the battery draining?

Thanks.