Goodman Variable Speed 2 stage furnace. This Furnace is equipped with the Comfort Bridge blue-tooth enabled board. This allows the the furnace to be setup with the use of the Cool Cloud app. 

This furnace does require the blower to be activated by setting up the blower for air conditioning, otherwise the blower will not turn on.

Also the furnace with no call to it will display "IdL", which just means that it is in an idle state with no call. This is not a trouble code.

The unit, when operating correctly, will flash back between fan speed and mode. This is also not a trouble code.

Trouble or error codes will have "EE" in front of a number so "EE2" for example is a pressure switch stuck open code. 

Below you will find more information