# Thermostat extension 

Press the button to control an external KNX room thermostat. Press the button to control an external KNX room thermostat. The configured side of the rocker (button) then acts as an extension of the thermostat to modify the basic thermostat configurations, such as operating mode, setpoint, switch from heating mode to cooling mode and vice-versa, as well as management of presence detection.

#Caution

However, the thermostat extension does not enter directly into the calculations carried out by the thermostat itself. It only works properly when all communication objects are linked to the appropriate objects in the associated KNX.