A faulty thermostat can be an easy and simple repair for a home handyperson. Remove the old thermostat and replace with a new unit, all that is required is to hook up the wires that are already there and screw the thermostat on the wall. The new thermostat will typically come with detailed instructions for installation.
Hydronic heating is a newer form of heat that circulates hot water through pipes in the floor, radiating the heat up into the air and the room. Any signs of moisture in the carpet or on the flooring should be immediately checked by a professional in hydronic heating as this can pose a serious structural issue for the home if there is a leak.