The compressor is outside. Look straight down into the unit, and you'll see
a black (normally) thing. That's the compressor. If the noise happens when
the fan is stopping, it could be the fan motor bearings.


"dean" wrote in message
oups.com...
The compressor is in the basement, right? Thanks for the description.

Bt what is the noise? The fan is smooth when its running. I took a look
but its not too clear, and I can't see any other motor in there, but I
don't know these things at all. I didn't even know they have a defrost.