I see. Is it supposed to make that tapping noise only when the heat/fan is turned on? I didn't notice if the noise was there if the fan was off.blower fan
Heater works, as you surely know the temp here in NJ.
So the blower fan is by the driver's side?
Obviously I've never faced this kind of problem with any cars...Only my Saaaab.
I was looking at this cabin filter thread