Solved it thanks for the help. Turns out the batteries were on the low side, enough power for the thermostat but not to transmit. After a full reset the battery icon started flashing. Seems to be working now!
First post please be gentle!
We have recently bought our first house which has a Danfoss TPERF thermostat in the hallway and a unit next to and connected to the boiler. The thermostat has been to set up to the times/temp we would like, however i have noticed that when we set the temperature...