Take the big square cover off the top of the afm (craft knife or flat screwdriver to pry it open).
Then carefully remove anything you need to, to get to the main soldered connections from the plug to the pcb board.
Re-solder all of those connections.
Then re-assembly the whole lot, silicone the cover back on top and see if that sorts it. I\'ve never replaced an afm, just fine that and its sorted it for me every time. The afm\'s I\'ve had due on me have never been the hot wire element in the intake, always old solder connections.