An system for monitoring the performance of a mobile environmental control unit (ECU) includes sensors for monitoring and detecting operating parameters of the ECU. A monitor processing and communications unit is coupled to the sensors for receiving and processing the operating parameter data signals from the sensors and relaying the processed operating parameter data signals to a computerized graphical user interface display via a network. The processed operating parameter data signals are graphically displayed to technical support personnel for determining problems or performance issues which may exist or may occur on an ECU remotely and offer corrective action.