Explanation: The controller has not received temperature data from the weather station in the past 24 hours. If more than 5 days pass after communication was lost, the controller will return to basic mode.
Resolution: Relocate the weather station so that it can communicate with the controller more easily. If you are getting this fault code and the "REMOTE BATTERY FAILURE" fault code, the batteries will need to be replaced and relocation of the weather station is not necessary. If this issue persists or can not be resolved by moving the weather station, it may be necessary to replace the weather station.