The fan speed control module replacement on a 1996 Saab 900 (same applies
to 1999-2002 9-3). It is a relatively common problem on these cars -- the
control module burns out, causing the fan to die (or sometimes blow at high speed all the
time, even when the climate control is off).
Note: the back of the module works as a radiator, and
attaches to the metal bracket under the dash, which helps further dissipate
the heat. It's not recommended to turn the fan on with the module hanging
loose as it might burn out again due to insufficient cooling.