If you hear the fan blowing, but are not getting air out the vents you probably have a clogged cabin filter. I think your car has one but I don't know where it is. You could tell if it's the problem probably by looking at the filter or just remove it, replace whatever cover, then try the fan to feel for exiting air.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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