Honda Fit 2009 Fan Control Knob?

The fan motor may be drawing too much power which in turn fries the blower motor resister pack. Replace the resister pack and it should fix your problem. Go to Advance Auto to by the part. Then follow the wires from the blower motor under the glove box to find the resister pack. It's mounted in the heater box assembly with a couple of screws. It's an easy job.

Highly unlikely it is the fan motor itself. In fact I would bet that the likely cause is a defective fan motor resistor pack which controls the speed of the fan. It will be located near the fan motor but where I cannot tell you. I would replace that before replacing a, more than likely, good fan motor as a bad fan motor would not run on any speed.

I agree with KY-Clay.

I found a ~90 second video on Youtube that shows how to fix it yourself (in sources), which is easier than explaining how to do it yourself in words. The part isn't especially expensive either, about $50 (or less) depending on where you buy it. The old resistor just unplugs and the new one plugs right in and that should fix the problem. Good luck.

I was suggesting the idea that the fan motor may not be defective at all since it operates at #4 high speed and mentioned that the resistor might be the problem. The service advisor told me that the resistor will just burn itself out in a few weeks time. He went over the problem in his computer & showed me that we may need to replace the blower itself along with the resistor.

Sad that they can't diagnose their own product.