---
title: Why is there a flashing antenna symbol on the Thermostat?
description: The flashing antenna denotes that the last message that the Thermostat sent to the linked Boiler Switch did not receive an acknowledgement. This may be because the unit is out of range. Solution The i
---

[Skip to content](https://support.lightwaverf.com/knowledge-base/why-is-there-a-flashing-antenna-symbol-on-the-thermostat#main-content)

Open main navigation

Close main navigation

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Help Center](https://support.lightwaverf.com/knowledge-base?hsLang=en)
2. [Connect Series Support Archive](https://support.lightwaverf.com/knowledge-base/connect-series-support-archive?hsLang=en)

- [Getting Started - What you need to know](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#main-content)
  
  
  
  
  
    - [Getting started on the Lightwave App](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#getting-started-on-the-lightwave-app)
    - [Lighting](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#lighting)
    - [Heating](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#heating)
    - [Third Party Integrations](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#third-party-integrations)
    - [General](https://support.lightwaverf.com/knowledge-base/getting-started-what-you-need-to-know?hsLang=en#general)
- [App Guidance & Automations](https://support.lightwaverf.com/knowledge-base/app-guidance-automations?hsLang=en#main-content)
  
  
  
  
  
    - [My Account](https://support.lightwaverf.com/knowledge-base/app-guidance-automations?hsLang=en#my-account)
    - [App Guidance](https://support.lightwaverf.com/knowledge-base/app-guidance-automations?hsLang=en#app-guidance)
    - [Automations](https://support.lightwaverf.com/knowledge-base/app-guidance-automations?hsLang=en#automations)
- [Troubleshooting](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#main-content)
  
  
  
  
  
    - [General](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#general)
    - [Lighting](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#lighting)
    - [Heating](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#heating)
    - [Power](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#power)
    - [Automations & Hub](https://support.lightwaverf.com/knowledge-base/troubleshooting?hsLang=en#automations-hub)
- [Installation Guides](https://support.lightwaverf.com/knowledge-base/installation-guides?hsLang=en)
- [Connect Series Support Archive](https://support.lightwaverf.com/knowledge-base/connect-series-support-archive?hsLang=en)
- [Contact Us](https://support.lightwaverf.com/knowledge-base/contact-us?hsLang=en#main-content)
  
  
  
  
  
    - [Product Returns](https://support.lightwaverf.com/knowledge-base/contact-us?hsLang=en#product-returns)
    - [Contact Us](https://support.lightwaverf.com/knowledge-base/contact-us?hsLang=en#contact-us)

# Why is there a flashing antenna symbol on the Thermostat?

The flashing antenna denotes that the last message that the Thermostat sent to the linked Boiler Switch did not receive an acknowledgement. This may be because the unit is out of range.

**Solution**

The issue may be rectified by moving the Thermostat closer to the boiler switch and ensuring that there are not large metal objects or bodies of water blocking the transmission path.

[![Chill listening crop-3](https://support.lightwaverf.com/hs-fs/hubfs/Lightwave%20Logo%20Green%20Small%20(320%20x%20132)-1.png?width=58&height=24&name=Lightwave%20Logo%20Green%20Small%20(320%20x%20132)-1.png "Chill listening crop-3")](http://lightwaverf.com)

<https://www.facebook.com/> <https://www.twitter.com/> <https://www.instagram.com/> <https://podcasts.apple.com/> [mailto:email@email.com](mailto:email@email.com)

Copyright © 2025, Lightwave