Blower fan will not turn off

It sounds like you have a blower motor relay that is stuck on, try to remove it to see if the blower stops.

Here are some diagrams (below) and a guide that will help us fix the problem. The relay is #107 in the last fuse box diagram

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

I included the wiring diagrams for both manual and auto system is case we need to go deeper.

Please let us know what happens so it will help others.

Cheers, Ken