Hello , thanks for your question in the autoaid Community.
Your described fault Code means: 8670 Airbag Telltale Circuit Malfunction
This fault is from the Airbag System, but it hasn´t anything with the Aircondition to do.
Limps the Lamp in your Dashboard at Ignition on?
When it doesn´t limps, you have to check the wirings and if there is all okay you should renew the Dashboard.
I would like to say better things to you.