Radio buzz from temp control dial!

Don't know if you had this problem from day one or not. It could be that the dial on the heater is generating the noise. Switches and dials have a tendency to do this when they get old and dirty. Stop at Radio Shack and buy a can of switch contact cleaner. Shoot a bit in there, rotate the dial back and forth and see if the noise goes away. If this doesn't work, see if you can giggle your antenna cable input to the radio and see if the interference goes away. If it does, then chances are you have a loose or intermittant connection in the antenna input.