I had similar problem with my fridge, took me awhile to figure it out.  Put 2 large ferrites on the AC power line between fridge and AC outlet, RFI was just about gone.  Wrapped them a couple turns each.

Also have even worse RFI problem with dishwasher, when its running HF rigs are nearly useless, tried everything I could think of, no affect on RFI noise, so only run dishwasher when not on the air.

Gook luck... 73

Emory  WM3M