Thanks for contacting us. To stop watering during winter, you can put Sprite in "paused" mode in winter, you will have winterize your system. First you will have to blow out the sprinkler. You can look at this video to find some useful information. https://www.youtube.com/watch?v=s3YRbJYmvgA&t=99s
Then you can put Sprite in "paused" mode just in case some one (for example the kids) accidentally starts a manually run from the app. To put Sprite in "paused" mode, you can go to Settings->Controller->Enabled. This information is on Netro forum. https://www.netrohome.com/forum/posts/96
Please let us know if you have further questions.