If you have a new economizer you are trying to install on an RGV model rooftop and the plugs don't line up you are probably missing the correct adapter. This takes you from the flat or skinny 10 pin to the 12 pin that is found on the new RGV boards. The instructions in the economizer will likely show the older style board and the install method will not make sense.

The part number is 1190937 .