An HVAC controller may be programmed using a mobile device that includes a touch screen display configured to display information and to permit a user to enter information, a network connection configured to communicate with a remote server that is itself in operative communication with the HVAC controller, and a controller in operative communication with the touch screen display and the network connection. The controller may be configured to receive one or more messages related to the operation of the HVAC system via the network connection, and to display the one or more messages on the touch screen display.