You need to do the pin swap and code the panel. The coding is simple, just need to select the option with no sensor if you haven't fitted the AQS.
Then you need to reset the panel and check if your AC compressor starts and if your air recirculation works. You can also change the temperature from Fahrenheit to Celsius or vice-versa, depending on the settings that you need and that your panel is set. There are DIY online on how to retrofit the panel that explain all these questions.
I have heated seats too and they work without needing any other fiddling.