svt_ivan
Full Access Member
Gen 1 Raptor. So this happens intermittently but every once in a while upon starting the truck up a clear thumping sound from behind the glove box is heard. After a couple of seconds or so the thumping goes away. A/C still working as it should and re-circulation is also functioning. I was thinking maybe a blend door motor on the brink of going out? Any recommended trouble shooting?