If you have all speeds on the blower, then the problem is NOT the resistor.
The click, click, click is most likely a piece of debris making contact with the blower fan. Does the click speed up with the blower settings on higher speeds? If so, most likely debris making contact with the fan.
Open the cabin filter door. You may be able to see and remove the debris.
At worst, you may need to remove the blower motor to gain access to clean out the debris.
FWIW, my Gen2 has had several similar issues when a maple tree seed falls off the cabin filter. There is a open duct work for the cabin air intake. Some people go to the trouble to open the cowl to place a mesh screen over the intake opening. They mainly do that for rodent prevention.
It isn't a big issue.