The centre LED will signal when the batteries need to be replaced. (as well as being view able in the app in settings - devices) From time to time you may see in the Wiser Heat app that either a room is showing no temperature data, or a device is showing no signal. This can happen due to a variety of reasons listed below:

Devices can be reset manually at any time e.g.if the Heat HubR is replaced. To remove thedevice binding to a heating system allowing it tobe joined to another system do the following: I've been reinstalling our Wiser TRVs recently as we are going through the phases of a home renovation and had similar problems to yours OP, now resolved.Your procedure to force the calibration after removing the thermostatic valve seems to have solved the problem. The TRV adapter is attached to the valve, and the M30 adapter and chrome ring nut (provided in the box) are used to screw the Wiser radiator thermostat in place. Both Worcester and Vaillant offer their own smart TRVS that are only compatible with their products. Advantages Managed to install everything which amazed me as I am absolute plop at DIY/Home improvements... however, there is a slight issue with the TRVs. The same with the bedroom, however it warms up ever so slightly, like as if it was the old Danfoss TRV set to 1 or 2 out of 5.

The Drayton Wiser system lets you set a schedule for each thermostat, indicating a desired temperature for each room in your home at different times of the day. For example, you can set the bathroom to warm up first thing in the morning and last thing at night, if you don’t use it during the day. As already mentioned, you can override a set schedule at any time by manually twisting the top of the radiator thermostat (turning the heating on in that room for 30 minutes) or from the app, where you can choose for the heating to remain on for between 30 minutes and three hours. Containing multiple sensors, the Wiser smart​ radiator​ thermostat can keep your room heated to a​​ ​​​specific​​​​ ​temperature that you set by either twisting the top of the TRV or using the app. ​For even more accurate room-to-room heating add a Wiser Smart Room thermostat to your system. ​​ ​ Yes, when a TRV from another room (lets call it room 2) drop below its setpoint temperature it will call for heat and the boiler will turn on to heat that room. If you only have dumb TRV's in the room with the room stat (lets call this room 1) then when Room 2 is calling for heat then Room 1 will also be heated as it has no way to turn off those radiators while the boiler is on to heat Room 2.From the home screen, you can also view the weather for your location and sunrise and sunset times, too. The cog icon at the top of the home screen provides access to the main Settings menu, from where you can activate smart modes such as Eco and Comfort, and set a temperature for the Away mode. So i think i did push the pin last night and it wouldn't budge/didn't move easily... so maybe that's the issue?