If you are reffering to the fan inside the car, the "squirel cage" can be reached behind the glovebox -it sometimes catches some stuff. The following webpage offers some insight on where and how.
http://www.clubgp.com/cgi-asp/mods.asp?modid=111
. "G"
Check your fuse box for a blown fuse and also check your connections at the blower motor.
Check for a bad blower resistor at blower motor
Check the vacuum hose under the hood. May have a leak or have been disconnected. Also check - The blower - this includes its motor, fan and associated components/wiring. Next to check is the coil (this looks like a small radiator) through which the blower moves air is clogged. Check if the vents themselves are clogged.
Check the cabin filter if applicable.
Depending on the year, make and model check the following............. 1. Trash in blower housing. 2. Defective blower motor. 3. Clogged cabin air filter. 4. Bad blower resister. 5. Bad blower switch.
The filter screen at the bottom my need cleaning. Also check the drain hose to see if it is kinked or clogged. If not, check the fitting where the hose connects to see if it maybe clogged.
Check coolant level check blower motor fuse Check the thermostat
The muffler is most likely clogged and will not allow the exhaust gases to exit the combustion chamber. Check the muffler for obstructions or replace the muffler.
You can test your heater blower motor by connecting a ground wire to the ground. Connect a power wire, from the battery to the positive post. If the blower motor turns it is working, and if it does not it is bad.
i have an 03 grand prix and yes it was the blower motor resistor also check there is a fuse for fan low and fan high or something like that
Check the following first........... 1. Coolant level. 2. Inside heater door operations. 3. Lastly check the heater core and make sure that its not clogged up....
Try cleaning out the lint screen first. Some washers have a removable agitator that contains a lint screen that can become clogged. Next check the hose connections.