This is generally caused by a corruption in memory, sometimes by third party software. A factory reset will restore the memory to default conditions.

  1. Press and Hold the UP arrow key for 30 seconds to restore the display console to factory default.  The console will beep and reset after 30 seconds.
  2. Let go of the UP arrow key.
  3. Wait several minutes for the outdoor sensor to resync with the console. Do not touch any buttons while waiting.

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