Best way to filter noise for AM band?

[bgadow]

Earlier this year I started noticing the lower half of the AM band was dead/full of hash at my house, or even in the driveway. I'd been putting off doing anything about it but, as I have a radio on the workbench that I'm fixing for someone else, I'd really like to get the band "back". So, this weekend I turned up the volume loud on one of my favorite consoles (a late 30's Delco) and walked around the house unplugging things to seek the offender. The winner? The new Frigidaire refrigerator we bought early this year! I'm guessing it can be blamed on the "inverter compressor technology". I've googled the problem but wasn't satisfied with the solutions. Does anyone here have firsthand experience in fixing it?