Entry Sensor's LED Not Blinking After Pressing the SYNC Button

 

If entry sensor does not blink after pressing the Sync button during the setup process, please check the following:

 

1. Please check if you have installed the battery with the correct +/- terminal.

 

2. If you have confirmed the battery +/- terminal is correct, the battery may have been depleted.  Please install a new CR123A battery.


If you still have questions, please contact us for further assistance.

Unresolved icon
105 undefined
FAQ
S380 HomeBase (HomeBase 3) Compatibility
140 views1 likes/2026-07-08 11:59:23
Compatibility Between eufy Devices
764 views1 likes/2026-06-24 17:12:13
Share Your eufy Devices With Your Family
114 views1 likes/2026-08-13 18:45:09
Two-Step Verification for eufy App
669 views1 likes/2026-06-24 17:55:48
How to Change the Wi-Fi Details for eufy Devices
532 views1 likes/2026-07-08 09:59:11
Alexa Setup Guide for eufy Devices
762 views1 likes/2026-06-24 17:01:33
Security Modes in eufy App
645 views1 likes/2026-07-03 09:34:40
Sign up for A eufy Account
778 views1 likes/2026-06-24 17:29:47
Using Google Assistant for eufy Devices
639 views1 likes/2026-06-24 17:23:21
Download icon
Entry_Sensor_manual_us
Download icon
Entry_Sensor_manual_eu
Download icon
【T8900】【Entry Sensor】EU Declaration
Download icon
5-Piece_Home_Alarm Kit_manual_us
Download icon
5-Piece_Home_Alarm Kit_manual_eu
Play videoHow to Set the Automation Function
How to Set the Automation Function
Play videoIntroducing eufy Security Alarm System
Introducing eufy Security Alarm System
Play videoHow to Share Account Access of eufySecurity Devices
How to Share Account Access of eufySecurity Devices
Play videoHow to Turn On / Off the Snooze Feature
How to Turn On / Off the Snooze Feature
Play videoHow to Use Geofencing on eufy App
How to Use Geofencing on eufy App
Play videoeufy App Functions
eufy App Functions
View More
Contact Us
Buy on the eufy Store
Download the App
affirmamazonPayamexapplePaydinnersClubdiscovergooglePaymastercardpaypalshopPayvenmovisa