Wait up to 10 minutes for the sensor information to come back online.Press and hold the reset button for 20 seconds.Reinsert the backup batteries (if applicable).(switching to a different Ethernet port on the router may be helpful) Power the unit back up by plugging the AC adapter and Ethernet cable back in.Unplug the unit from the Ethernet cable and the power adapter.Remove the backup batteries from the Access (if applicable).NOTE: You may need to bring an AcuRite sensor within 3 feet of the Access for them to re-pair. Verify that there is a My AcuRite® compatible sensor powered on within 330 feet (100 meters) minus obstruction of AcuRite Access®.Other electronics including a TV, computer, radio, or microwave can cause wireless interference. A sensor will send the data packets on a 433 MHz radiofrequency. Confirm the Access is at least 3 feet (.9 meters) from other electronics including the router.What color is the light on the front of the Access model 09155M? Click Here to review what the light on the front of the Access represents.If all sensors on the My AcuRite® Dashboard show offline or you received a Communication Loss Alert, you will need to check the AcuRIte Access® Connection by following the suggestions below. If only one or some of your sensors are offline, please skip to the second half titled One or Some Sensors Offline. If all of your sensors are offline, please refer to the top portion of this article titled All Sensors Offline. If any of your AcuRite sensors are offline on your My AcuRite® Dashboard and/or you received a System Alert, we recommend reviewing the appropriate steps below.