Harvesting wheat in Australia. Moisture meter has stopped giving a reading. Tried re-calibrating, checked fuses & relay, pulled plug off the side of moisture plunger & plugged back in & seems to make plunger go in & out ok but continues to say on the command centre "Moisture Sensor Not Sampling". Put new seal in top of plunger a couple of days ago & that doesn't seem to be the problem. Moisture sensor has been sampling at 2 samples per minute. Can anyone help?