Open-close sensor help
Low battery warning
Your contact sensors come with the battery pre-installed. However, when it's time to replace it, you'll be notified on the device itself and through the O2 Home app/website. Follow these steps to replace the battery:
- Remove the case security screw from the end of the transmitter.
- Press the tab on the end of the transmitter and remove the top case.
- Remove the depleted battery and dispose of it as required by local laws.
- Wait two seconds.
- Insert the replacement CR2 battery paying careful attention to the battery polarity. The positive (+) battery end points toward the transmitter printed circuit board. The negative (-) end sits on the spring contact.
- Replace the top case by inserting the two hooks on the top case into the battery end of the bottom case, then snap the case closed.
- Replace the case security screw and test the sensor.
Device offline warning
If your contact sensors shows as offline, try the following steps:
- Open and close the window or door where the contact sensor is located. This may help restart communication with the O2 Home hub.
- Make sure the sensor is online by going to "Devices", located on the menu bar of the O2 Home app/website, and clicking the down arrow of the sensor's icon to see its status. Note: You will have to close this window to access the app/website.
- Remove and reinsert the batteries.
- If none of this works, your battery may need replacing. See the "Low battery warning" section above for how to replace the battery.
Tamper detection warning
If the case of the sensor has been opened, you will receive a notification on the O2 Home app and website. Check that the device case is securely closed.
Sensor causing registering no alarm, a false alarm or both
Have you recently added or moved any wireless devices such as a baby monitor, wireless speakers, or another O2 Home device? If so, power off the new devices or move the devices back to their original location to see if they may be the cause of the issue.
If a new device was causing the interference, you can attempt to change the location, position or frequency (if available) and then verify if it causes the sensor to go back offline. If it does, give us a call on 0344 499 0202 for assistance.
Make sure the sensor is online by going to "Devices", located on the menu bar of the O2 Home app/website, and clicking the down arrow of the sensor's icon to see its status.
If the status shows “Online”, check that the battery symbol is not indicating that new batteries are needed.
Sensor appears to always be open
Check that the two parts of the sensor are still within 19mm (1/2”) of one another. If not, they’ll need to be put back together.
If this didn’t work, call us on 0344 499 0202 for further help.