Abstract: A method and apparatus for testing an HVAC component is provided, the field-testing system includes an external device to test the HVAC component, and a field testing device includes at least one testing output to provide an input signal to the HVAC component, at least one testing input to receive an output signal from the HVAC component, and an external device interface to communicate with the external device, to control the at least one testing output in response to the external device, and to monitor the at least one testing input in response to the external device.

Abstract: An HVAC control mounting assembly including a housing, including at least one communication module receptacle, and a communication module disposed in at least one of the at least one communication module receptacles. An HVAC controller assembly including an HVAC control unit, and a mounting assembly operably coupled to the HVAC control unit the mounting assembly including: a housing including at least one communication module receptacle disposed therein, and a communication module disposed in at least one of the at least one communication module receptacles.