Hello My name isXXXXX will be glad to assist you today in answering your questions.
This issue can be causes by three components either the a/c head which is a computer, blower resistor or the fan itself. normally when the resistor for the fan goes bad the fan runs on high speed all the time. its like a fail safe mode.
First thing I would suggest to try would have the vehicle scanned for codes the a/c control module might give you the information that explains this issue.
This sounds like the fan is going bad,
Few questions, does the a/c control panel function as it should?
when the fan operates does it have multiple speeds or just one?
Bryan ,fan always works only at first startup daily and at all speeds,runs quietly.,After next startup may run after 15-20 min of driving. thx
Bryan, does the fact the fan always works the first time you start the car daily until it is shut off, narrow it down to the problem? Jim