Integrated control system using a microprocessor

In a temperature control system for a temperature changing apparatus delivering temperature conditioned air from a plenum by an air blower to a space comprising

• space temperature responsive means adapted to respond to the temperature in the space,
• control means adapted to control the temperature conditioning apparatus,
• means connecting said space temperature responsive means to said control means to maintain a predetermined temperature in the space,
• operating output temperature responsive means adapted to respond to the output temperature of the conditioned air,
• means connecting said operating output temperature responsive means to said control means for detecting an abnormal operation of the temperature conditioning apparatus upon an abnormal increase in the output temperature, wherein said output responsive means upon a first increase to a first predetermined output in operating output, provides a visual indication of said first output, upon a second increase to a second predetermined output in operating output, provides a signal to said control means to reduce the operation of the temperature conditioning apparatus, and upon a third increase to a third predetermined output in operating output, provides a turning off operation.