My 2009 altima air conditioner is not working. I turn the climate control on and the system sounds like it is working (fan blower runs, lights on the control are lit) but the cold air is barely coming through the vents. I replaced the cabin filter about two months ago and checked the fuses. The air is ice cold from the little air coming through the vents. I switched modes to defrost and floor vents which the air barley comes through those too. Does anyone have any idea what it can be? Also, I have 45,000 miles on mhy car so it is not covered under warranty.