My air-conditioning started just dropping from blowing high and then blowing very low. I could turn the AC off and the high to low and back to high again and it would start blowing cold high in the AC off position. It made no sense. It was working on AC off. Then I would turn it on high and it would work awhile. So the Nissan dealer said he took my fan motor apart and removed the debris and a leaf and now it is fixed. $95.00 to take a leaf out. Ridiculous!