AC/Heater blower fan has vibration.

At fan speeds above 1, it sounds a little like a helicoptor. Anyone experience this one? Is the blower motor bad or loose? <br>
Thanks,<br>
Edmund<p>

My wife was complaining about a vibration in her fan, so I wanted to compare with mine. Then I realized that my ML55 ALSO had a vibration. My car was having the ''wheel shake'' from a Bad Rim (which the factory technician said was ''normal'' for a performance vehicle) so I showed them how my steering wheel would also ''shake'' with the fan on AND THE ENGINE OFF. Boy, were they embarrassed. They replaced the out-of-balance fan motor, but never discovered the bad rim. I had to finally take it to Mr. Tire to find that. (The factory tech did respond to my e-mail by calling me twice in January to say that he had left word at the dealership to notify him if I returned with the wheel shake problem in that he had realized that I was right. The dearler never called him and the Regional Rep. has never admitted to their failing.)<br> <br> My wife's car was cleared of the problem (for free) and we have never figured out whether a squirrel or a nuthatch had dropped the acorns into the front air intakes. This would seem to be a design issue. The mechanic was not even surprised to have such large items enter the vents as he handed me all those little acorns. (They were a lot.)<br> <br> Hope this helps you. I think I'll have to return with the 430 as it seems now to have some leaves. Oh, well.<br> <br> Enjoy! . . . . . . . Jüri.<p>conpx02.hcfa.gov

Usually, they are on top of the engine, the manifold, or in the air filter. Only the ML has had something in the inside fan area. This can be a problem since it is not easy to get to, or am I wrong. Any help for screening out the critters and birds??<br> <br> Thanks! . . . . . . Jüri.<p>conpx02.hcfa.gov

ML fan is pretty easy to get to.. it's near the front passangers feet...<p>jl374.resnet.cornell.edu