This issue started last summer. The dash AC/Heater fan stopped working. I couldn’t figure it out and then for no reason it started working again. Six months later it has become an issue again. I got in the other morning and it worked when I started the car. I drove awhile and stopped for gas. When I turned the car back on it wouldn’t work. Notables: The Heat and AC work fine when it does run. Also, the rear Heat and AC have never had issues. Any help you may have would be appreciated. I hope your assistance leads to my being able to save money and fix it myself. Thank you in advance!

I have the exact same problem lately with my 2005 Sienna LE. I am not sure it this related; it happened after I changed a new battery.