(Error 4): Network Unit is overheating.
Your Network Unit is overheating.
Try this… insure that your Network Unit vents are clear of any blockage, and that the location of the unit allows free flow of air. If you have your Network Unit in an attic space you may need to relocate the device to insure that the system does not continue to overheat. Once your Network Unit has cooled down it will operate as normal.