I have read all the questions and anwers and I am still shivering in the cold. The battries on the Boss Therm BRTRF ran out (didn't even know it used batteries...installer didn't alert us to this). Changed the batteries and still nothing! I cannot see this BR1 receiver which is referred to in the abysmal instructions that came with the unit and that is referred to on this forum. Where is it? I have a back boiler and this thing is nowhere to be found. I am at my wits end...I cannot easily get into the back of the BRTRF unit and I am stressed.

Jayke, February 2015

most likely this receiver will be near the hot water tank if u have a back boiler

kash, February 2015

The Receiver (BR1) has lost communication with the Sender Unit (Thermostat). To re-establish communications carry out the following.
1) Using a Phillips Cross Head screwdriver remove the back plate from the thermostat which will give access to 2 Buttons. LEARN & TEST.
2) Go to the Receiver (BR1) with the thermostat and a small screwdriver.
3) The BR1 will have a a RED light on.
4) Using the small screwdriver Press and keep Pressed the LEARN button until the GREEN light starts to flash on the BR1. With the LEARN still pressed, press the SET button (Not the Reset) on the BR1 and the light should go solid GREEN.
5) Prees the TEST button on the Thermostat and thats it, the system should be communicating again.
6) Replace the Thermostat back plate.

If this does not work and you don't have a steady red light on the receiver unit then it has a fault, at the boiler you can disconnect the receiver unit wires and insulate with electrical tape, then put a direct link in between the two switch connections with one piece of wire, this will allow the timer control to be used

kash, February 2015