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.