can anyone describe what could be the problem of a blower/fan that just does not seem to have the power to heat or cool? I can hear it going, but it really should blast me out of the car, it seems, when it is on high? I just hate to see a huge bill for this...blower motors can be around $400, from what I am told. Thanks

repair report: needed blower and regulator installed at the dealer: total cost was $908.00 about $400.00 more than I thought.