Hi , it maybe the batteries are on their way out, if you are loosing communication .sometimes it can be distance from stat to the reciever, .try changing the batteries. There is an override on the reciever if your stat ever fails . just push the button and this will turn the heating on bypassing the stat
There are online instructions, but very basic
Thanks, ***** ***** change batteries is it set up automatically or is there something you need to do to get it to operate again?
Should reconnect automatically. Turn the stat up and down
Also if you need to press the "SET" button to override how do you return it to normal operation?
Just by pressing it again