alarm motion sensor 1st gen not pairing

i have a first gen motion sensor which will not pair.

i have tried battery off for 10 mins,resetting it etc.

i have added this device and got as far as take the tab out on the back of the sensor on the app.

i have done this,the sensor has flashed 3 times in blue about 5 times thens goes off.

i have just purchased this ssytem from ring and all the other ones are fine.

can you help please.

Hi @incar. Since you have done the extent of the troubleshooting that you can on your end, please give our support team a call at one of the numbers available here. We’re taking additional steps to protect our team and help reduce the spread of COVID-19. This has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support. Let us know how the call goes and what steps you took to get it up and running or what our support team did. Your answer may help another member in the Community that may run into this. :slight_smile: