Sorry, If This Has Been Posted Before . My 2001 f350 a/c blower works better on a/c compared to max a/c . When I turn the selector to max a/c it makes more of a blowing noise but less air blows out of the vents though. When I select plain a/c it makes less noise but blows more air out of the vents. Any ideas what is wrong and how to go about fixing it is 93 here today and won't get much cooler over the summer months . Thanks for reading .

 

Look for trash or a plastic back sucked into the inside inlet, behind the glove box. The inlet is blocked.

 

There are inlets inside the cab to recirculate air in the cab.

 

Thanks , project I got to it yesterday. I'm embarrassed to say it was a small plastic bag . Thanks for the info it was helpful and my 2 year old son and I both thank you

 

Glad it was a simple, no cost solution.

 

Yeah so was I