If the transmitter does not communicate with the receiver, make sure that the communication code of the transmitter and receiver is set correctly. If the receiver controls the boiler contrary to the transmitter’s indication, change the communication code to a different one than the factory one (for details see the manual). It may also happen that another wireless device operating on the same frequency or a neighbour’s regulator controls our boiler. Remember to reset the transmitter after changing the communication code and turn the receiver on and off. Before sending the regulator to the service, make sure that there are working batteries in the transmitter. Partially exhausted batteries may weaken the signal.