i had a problem with my windshield wipers on my truck - i took the protective shroud off directly underneath the windshield to work on it and i didnt put it back - last fall a lot of leaves fell on the truck and when i turned on the blower i could hear the leaves inside the fan

in the truck when you take the fan motor out the little round fan cage is attached to it - i cleaned out the leaves and put it back and put the shroud back on and its good as new

so if its the same all you have to do is take it out - clean out whatever is in there, bolt it back on

if the motor is bad they are usually cheap and you change them the same way - very simple