Can you see the box probe port on a D model? If you can, plugging the box probe into the meat probe port would tell you whether the problem was on the controller side or the probe side.
Sumoray, just wondering if you have solved your probe issue. I fired up the 3D this past weekend and same thing. With only one probe and port I didn't have many options for troubleshooting. Any advice would help thanks.
Court, when you look at the plug end of the meat probe check to see if the sleeve above the probe prong is screwed on tight. Occasionally, it can be something that simple. Mine seem to get loose and need tightening from time to time.
