02-05-2014, 06:11 PM
Interior fan recirc flap in the heater box. Mine does the same albeit very quietly.
Team Eaton
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft