Terma BlueLine Next 4+

Why design this thing to communicate via Bluetooth? Even when it’s working, which is not often, I get “Device out of range” when I try to use the app downstairs to control the radiator upstairs. I have to go half way up the stairs to get within Bluetooth range. Why not design it to work over WiFi which is much stronger throughout the house?

The whole thing is an utter shambles, frequently losing connection, needing to be unpaired and re-paired. Its latest trick is to refuse to pair, despite following the instructions to the letter. Great. So now I can only use the heater as a manual device, the app does nothing at all. I’ve unpaired, re-paired, deleted, reinstalled and updated the app all to no avail. Underdeveloped junk. I loathe it.

Useless App! Rarely connects - always says out of Bluetooth range even with phone right next to Bluetooth module. Schedule mode doesn’t work at all! Timer mode works on about 7th attempt on each (we have two of these radiators) - it keeps cancelling the timer setting. Both Bluetooth modules are being removed shortly to fit standard time clocks to the radiators instead. What a waste of money this has been. Could be a useful app if ONLY it worked instead of spending 5 minutes fighting each radiator just to turn them on.

After finally connecting/syncing through the device tab on the main screen iOS (which I read to do in these reviews) it’s just a matter of tweaking & playing around - I’m using the KTX4 & the room temperature sensor is way out of calibration and there doesn’t seem to be a way of recalibrating or resetting the controller
So I’m just using by the heaters temperature in the schedule definitely needs some improvements to work easier but it’s not too bad
Also don’t seem able to set separate schedules up as it says you can