Very annoying!
On a 9-3 (1999), when the heater fan control is on the second position (2), it make a "cricket" like noise. If I turn it to 1 or 3, it disappears.
Also, it seems to get louder when I step on the gas where you will not hear it at all if I take my foot of the gas.
Any idea what this could be and how can I fix it?
Cheers, Ben