In message . com>
"Erik" > wrote:

> Sounds like a kids toy lawn mower or when you put a baseball card
> inside the wheel of a bicycle.

Are you absolutely sure that the noise is comong from the compressor?
Your description of the noise sounds much more like a leaf, or other
obstruction, caught in the ventilation fan.

--
Peter Bell (Note Spamtrap - To reply, replace 'invalid' with 'bellfamily')