Honeywell TH6100AF2004 Programmable Thermostat with Floor Sensor for slab heat

Honeywell TH6100AF2004 Programmable Thermostat with Floor Sensor for slab heat . FLR is displayed above the temperature in this mode. This single stage thermostat is used to control the ambient air temperature, the slab temperature or both. In the “A” mode, the ‘stat controls at and displays only the ambient air temperature In the “F” mode, the thermostat controls and displays the temperature of the heated slab. FLR is displayed above the temperature in this mode In the “AF” mode the device controls to and maintains the ambient room temperature as well as maintaining the desired floor temperature