I have a 2000 sportage. The heater fan does not

Charlie, 1st thing is to check your fuses. I will post some links to help you see and solve problem. May not be your exact model but steps are basically the same.
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fan motor,fuse or fan ressistor.hope this helps

yes you can also check at passanger side for plug that goes to fan unplug it and check for power with test light

May just be a blower motor. If you can access the motor, turn the heater on high ang check for power at the motor. If there is power, it is the motor that is the problem.If there is no power at the motor, you will need to check the fuses If they are ok, it will be a wiring problem.

Check and see if you have power to the blower motor regulator. It is located behind the glove box.

Check fuse supplying fan is not blown,
Check blower control switch is operating OK,
Check relay controlling fan is operating OK,
Check variable speed resistor pack is not faulty (the resistor pack is usually located in the blower ducting, in the blower airflow),
Check blower motor ground connection is not missing.

sounds like a blockage to the heater matrix ,not a job for us enthusiasts,might involve front dash removal to accses it.although an engine reverse flush could do the trick.

Take to dealer. The wiring harness on the New Beetles have issues.

Hi
Check for bad connection at heater resistor or try tapping heater motor lightly
with ignition switch on and heater switch on. Could be heater switch connection.