Sadly the Aero doesn't have Bowden cable operated heater flaps. This screenshot from parts book shows just rotary switches and/or potentiometers. It's all appears to be electrically controlled therefore. Note there is one control that selects fresh or re-circulating air.

[Linked Image]

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone