I have a 2001 Camry that in the last 3 days has started making a thumping sound when the fan is set at the higher speeds. Also, at the lower speeds, there is no noise but no air flow as well. At the higher speeds, along with the thumping sounds, I do get a little air flow. From reading other posts/replies, the blower resistor seems to be the first place to look but I have not read any other posts that have combined the thumping noise along with no air flow at the lower speeds. Is there anything else I need to look at? Thanks in advance for the assist.

 

A bad blower resistor would result in high speed only operation.

The blower/motor is held in by 3 screws and easy enough to drop out and inspect the blower cage.

 

Well, it turned out to be something entirely different. Something, I assume a field mouse had made nest in the blower fan. On lower speeds, there was no air flow because the fan was so clogged that it could not push any air and the thumping noise at the higher speeds was probably due to the weight of the nest not letting the fan spin evenly. I had already pulled the blower resistor and checked it out and found no obvious problems but replaced it with the new one I had purchased since I already had everything tore down anyway. After cleaning out the fan and putting it all back together, it runs like a champ. Thanks for the assist.