--- title: What do I do if my Solius device is showing a red light? description: "Flashing red: emergency stop engaged—turn the red button clockwise until it pops up. Solid red: error mode—open the app, connect via Bluetooth, and follow the on-screen error instructions." --- [Skip to content](https://help.solius.com/faq/what-do-i-do-if-my-solius-device-is-showing-a-red-light#main-content) [![sol-logo-primary-rgb-reg-black - email small](https://help.solius.com/hs-fs/hubfs/sol-logo-primary-rgb-reg-black%20-%20email%20small.png?width=148&height=30&name=sol-logo-primary-rgb-reg-black%20-%20email%20small.png)](https://solius.com?hsLang=en) - [Get Started](https://www.solius.com/get-started) - [User Manual](https://www.solius.com/user-manual) - [Clinical Research](https://www.solius.com/research) - [Contact Us](https://www.solius.com/contact) Open main navigation Close main navigation - [Get Started](https://www.solius.com/get-started) - [User Manual](https://www.solius.com/user-manual) - [Clinical Research](https://www.solius.com/research) - [Contact Us](https://www.solius.com/contact) How can we help you? - There are no suggestions because the search field is empty. 1. [Solius Knowledgebase](https://help.solius.com/faq?hsLang=en) 2. [Using Solius](https://help.solius.com/faq/using-solius?hsLang=en) # What do I do if my Solius device is showing a red light? The behavior of the red light indicates two different scenarios depending on whether it's flashing or solid. **Flashing red light:** Your emergency stop button is engaged. To disengage it, turn the red button on top of the device clockwise until it pops back up. The device cannot start therapy until this button is released. **Solid red light:** Your device is in error mode. Open the app, tap "Start therapy," and connect via Bluetooth. Once connected, an error message will appear describing the issue. Refer to the Troubleshooting section of the [User Manual](http://www.solius.com/user-manual?hsLang=en) to resolve the error. If the problem persists, contact Solius Customer Service at [hello@solius.com](mailto:hello@solius.com). [![Group 3-2](https://help.solius.com/hs-fs/hubfs/Group%203-2.png?width=195&height=50&name=Group%203-2.png "Group 3-2")](https://www.solius.com?hsLang=en) Solius is an FDA-cleared over-the-counter (OTC) UVB light panel intended to stimulate production of vitamin D in people 22 years and older. Solius is clinically proven to stimulate the production of vitamin D. References to the benefits of sunlight, UVB light, and vitamin D are based upon published, peer-reviewed research. The Solius device is not intended to diagnose, treat, cure, or prevent disease, except for the indications for use described in the user manual for your applicable region. Solius does not provide specific medical advice to users. Users should seek advice from a qualified physician or healthcare provider. This website does not establish a doctor-patient relationship. For detailed product information please consult the User Manual prior to use. Solius® is a registered trademark of Solius Labs, Inc., 100 Ravine Lane NE, Suite 310, Bainbridge Island, WA 98110 © 2026 Solius Labs, Inc.