If your device is not detecting cycles this could be the result of a couple of issues;
First, you should make sure your filter sensor is connected. Go into your Account > Hardware. You will now have the ability to “Add Hardware". You can then add your new Filter sensor.
Next, check to see if your filter sensor is online. Go into Account > Zones and Devices. If your app is displaying this error, then your Filter Sensor is offline.
This could be the result of the HUB being too far from your sensor, in which case you should move your HUB closer in proximity to your sensor.
If your device is displaying this error, then you will need to replace your batteries.
SmartAC.com sensors are designed to only use special high-capacity AA lithium batteries that can operate in a wide temperature range. Please ensure you replace all of your sensor batteries at the same time. In the future you will have the ability to easily purchase high quality OEM replacement batteries at discounted member pricing.