I'm posting this here since its a empty space that may serve better as a OFF TOPIC or CLASSIFIED.
Any who...
An apology in advance to the Auto Mechanics out there.

The HVAC blower fan 5-speed control on my 07 went to a 3 speed and eventually to OFF or high speed only. Did a little research and narrowed it to be the motor resister control module. Picked up an after market on ebay for 15 bucks shipped ($109 dealer part). Watched a video on youtube and changed it in 20-min tops. 2 screws and 2 clips. The old one had rusted and was literally falling apart (surprising high speed worked). If your fan speed control isn't working, don't spend your hard earned cash on a simple fix. Youtube and ebay can save you money to buy more jig heads...lol.
Herb