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There is a FAN switch at about 1 o'clock, be sure that it is not set to ON... but to 'auto'... tell me if the fan still stays on or not.
This can get pretty technical, tell me a lot about your technical skills so that I can coach you most effectively.
We can go from there.
If you have the skills to dig deeper into the electronic controls send me a photo of the wiring diagram glued inside the blower access door.
Use the attach files like for that to the left of your send button. I will mark it up with trouble shooting instructions, so far I suspect a bad printed circuit board.