GE ECM, a division of GE Industrial Systems, has introduced the TECMateXL, a troubleshooting device for the GE ECM variable-speed motor used in hvac applications. The TECMateXL isolates the ECM from the system and verifies if the motor is working. GE created the device to help service technicians accurately diagnose the motor. The unit runs on 24V AC power and can test in heating, cooling, thermostat, variable-speed, dehumidification and fan only modes. GE ECM.