The Control Boards for Air Conditioning and Heating are electrical devices consisting of a flat insulated surface that contains switches. Furthermore, the dials and meters for controlling other electrical devices are also part of the Control Circuits. Besides, all the sequences and things in the system that need to work electrically. And mechanically to make the system work properly. It all begins with the controls to make it work properly.
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system (Control Boards) to regulate the operation of a heating and/or air conditioning system. Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken.