I had this same issue, but it was actually caused by the microwave plug next to the fridge. Try moving the microwave plug and such, too, if it is still there.
Don't know if you resolved the issue or not, but someone else recently posted about the same thing. You need to pull the fridge out and break the barnacle on the wall that's clipping into the fridge. There can also be a pile up of roaches under, or behind the fridge that cause the same issue.
