Boiler controls have a ROOM setting that selects the approximate temperature in the building. The boiler control does not measure the actual room temperature so the ROOM setting is simply the approximate desired temperature in the building. To get more heat, increase the ROOM temperature setting in 2-degree increments until the building feels warm.
On a three-button control, press all three buttons together, then let go. You will enter the Adjust menu. The first setting is the ROOM setting. Press the up arrow button to increase the setting. Wait 20 seconds and the control will record the setting and go back to the View menu.
On a four-button control, press the menu button to enter the Adjust menu. The first setting is the ROOM setting. Press the up arrow button to increase the setting. Wait 20 seconds and the control will record the setting and go back to the View menu.