--- title: Why is the blue LED flashing when my shower is off? description: Is your ShowerStar blinking blue when the water is off? Fix phantom flow detection by tightening your mount, recalibrating Learn Mode, or adjusting settings. --- [Skip to content](https://touchgrid.com/knowledge-base/blue-led-flashing-when-shower-off#main-content) [![header\_logo](https://touchgrid.com/hubfs/TouchGrid_2026/Images/header_logo.svg)](https://touchgrid.com/?hsLang=en-au) - [Product](https://touchgrid.com/product) - [Utilities](https://touchgrid.com/utilities) - [Support](https://touchgrid.com/support) - [Calculator](https://touchgrid.com/shower-savings-calculator) - [News](https://touchgrid.com/news) - [Shop](https://shop.touchgrid.com/products/showerstar-shower-sensor-timer-app) Open main navigation Close main navigation - [Product](https://touchgrid.com/product) - [Utilities](https://touchgrid.com/utilities) - [Support](https://touchgrid.com/support) - [Calculator](https://touchgrid.com/shower-savings-calculator) - [News](https://touchgrid.com/news) - [Shop](https://shop.touchgrid.com/products/showerstar-shower-sensor-timer-app) - [Contact](https://touchgrid.com/contact) [Contact](https://touchgrid.com/contact?hsLang=en-au) How can we help you? - There are no suggestions because the search field is empty. 1. [TouchGrid](https://touchgrid.com/knowledge-base?hsLang=en-au) 2. [Troubleshooting](https://touchgrid.com/knowledge-base/troubleshooting?hsLang=en-au) # Why is the blue LED flashing when my shower is off? If you see the blue LED flashing on your ShowerStar while the water is turned off, don’t worry. This usually means the device’s **smart flow detection** is sensing vibrations in the pipe or background noise and mistaking it for water flow. Because ShowerStar uses **behavioural nudges** to save you water and energy, we want to ensure it only wakes up when you are actually showering. Follow these simple, practical steps to fix the issue. ### 1. Check the mounting cradle The most common cause of "phantom" flow detection is a loose connection between the device and the pipe. - Check that the mounting cradle is secured firmly to the shower pipe. - Ensure the zip ties are **fastened very tightly**—remember, this is a "2 minute DIY install" with "no tools" required, but a snug fit is essential for the sensor to distinguish between water flow and pipe vibration. ### 2. Check the device insertion Ensure the ShowerStar unit is fully inserted into the mounting cradle. It should sit flush against the mount to accurately detect the temperature and flow. ### 3. Adjust location and run Learn Mode If the blue light persists, the current spot on the pipe might be subject to external vibrations (like a washing machine or nearby plumbing). - Try moving the ShowerStar to a slightly different location on the shower arm. - Once moved, you must perform [**Learn Mode**](https://touchgrid.com/hubfs/Help%20Desk%20Documents/TG-CS1101_Learn%20Mode.pdf?hsLang=en-au) again so the device understands the new baseline. Watch the video, please click the [Installation Guide](https://vimeo.com/1017040300). > **Note:** You can find the specific "Learn Mode" instruction document here: [Link to Learn Mode Guide](https://touchgrid.com/hubfs/Help%20Desk%20Documents/TG-CS1101_Learn%20Mode.pdf?hsLang=en-au) ### 4. Turn off the Blue LED setting If you prefer, you can simply disable the standby flashing feature entirely through the app. This will not affect your traffic-light timer or savings data. - Open your TouchGrid App. - Navigate to Device Settings. - Select [**Off Blue Flashing**](https://touchgrid.com/hubfs/Help%20Desk%20Documents/TG-CS1104_Off%20Blue%20Flashing.pdf?hsLang=en-au). ### Still need help? For a visual walkthrough of the installation, refer to our [Installation Guide](https://vimeo.com/1017040300)Video or the Quick Start Guide. If the issue continues after trying these steps, please [Contact Us](https://touchgrid.com/support?hsLang=en-au) so we can get your household back to saving water, energy, and money. - [FAQs](https://touchgrid.com/knowledge-base/faqs?hsLang=en-au) - [Getting started](https://touchgrid.com/knowledge-base/getting-started?hsLang=en-au) - [Troubleshooting](https://touchgrid.com/knowledge-base/troubleshooting?hsLang=en-au) - [General](https://touchgrid.com/knowledge-base/general?hsLang=en-au) - [Reports](https://touchgrid.com/knowledge-base/reports?hsLang=en-au) [![footer\_logo](https://touchgrid.com/hubfs/TouchGrid_2026/Images/footer_logo.svg "footer_logo")](https://touchgrid.com/?hsLang=en-au) Copyright © 2026, Touch Grid. All rights reserved. ```json { "@context" : "https://schema.org", "@type" : "Organization", "contactPoint" : { "@type" : "ContactPoint", "contactType" : "customer support", "url" : "https://touchgrid.com/support" }, "logo" : "https://touchgrid.com/hubfs/touchgrid_logo.jpg", "name" : "TouchGrid", "url" : "https://touchgrid.com" } ``` ```json { "@context" : "https://schema.org", "@type" : "FAQPage", "mainEntity" : [ { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "The blue flashing LED indicates the ShowerStar is detecting water flow. If the shower is off, the sensor may be detecting vibrations in the pipe. Ensure the mounting cradle is zip-tied very tightly and perform 'Learn Mode' via the app to recalibrate the sensor." }, "name" : "Why is the blue LED flashing when my shower is off?" } ] } ``` ```json { "@context" : "https://schema.org", "@type" : "HowTo", "description" : "Steps to troubleshoot phantom flow detection on your ShowerStar timer.", "name" : "How to stop ShowerStar blue LED from flashing when off", "step" : [ { "@type" : "HowToStep", "name" : "Tighten Mounting Cradle", "text" : "Ensure the mounting cradle is mounted firmly to the shower pipe with the zip ties fastened very tightly." }, { "@type" : "HowToStep", "name" : "Check Device Insertion", "text" : "Ensure the ShowerStar unit is fully inserted into the mounting cradle." }, { "@type" : "HowToStep", "name" : "Relocate and Learn Mode", "text" : "If the device still senses phantom flow, move it to a different section of the pipe and perform 'Learn Mode' via the app." }, { "@type" : "HowToStep", "name" : "Disable Blue Flashing", "text" : "Alternatively, you can turn off the standby light feature by selecting 'Off Blue Flashing' in the device settings." } ], "supply" : [ { "@type" : "HowToSupply", "name" : "ShowerStar Device" }, { "@type" : "HowToSupply", "name" : "Zip ties" } ], "totalTime" : "PT5M" } ```