Knowledge Base

(CO) Controller Off

Lance Elliott Updated April 1, 2026 1 min read

When a Controller Off (CO) status alert occurs, it means that a user has placed the controller into OFF mode.

While in OFF mode:

  • All scheduled irrigation will stop indefinitely

  • A normally open master valve will be left in the open, or in the default position

  • The controller will continue to receive daily ET data and calculate specific depletion

  • Manual Irrigation, Runtime Valve Test, and MV Override are still enabled

Clearing a Controller OFF Status Alert:

You do not need to do anything to clear a Controller OFF status alert.  The alert will clear when the controller is turned back on.  The controller can be turned back on from the controller, from WeatherTRAK Central, or from the WeatherTRAK mobile app.


To learn how to change controller modes from your WeatherTRAK Mobile, or from the control panel, read:

Controller Mode: Off, Shutdown, Winterize

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Related in Alert Types.

  1. (NC) No Connect Valve alerts are viewed in the Alerts menu. If you have an alert, you will see a two-letter abbreviation (NC,
  2. (OFL) Controller Offline When a controller offline alert occurs, it means that the controller has not had recent communication with the WeatherTRAK Central
  3. (CCRP) Climate Center Rain Pause When a Climate Center Rain Pause (WeatherTRAK Rain Pause) alert occurs, it means that irrigation has been paused by the
  4. (SHD) Station High Depletion When a station high depletion alert occurs, it means that the station depletion rate is greater than 70% while in