My daughter has a 99 Beetle GL and the A/C and fan went out. It's the A/C haeadunit that needed to be replaced. The switches short out and you have to replace the whole piece. VW charges about $225 for the part Hope that helps
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CHECK BLOWER MOTOR FUSE AND RELAY.IF ALL IS GOOD.BEST TO REMOVE BLOWER MOTOR HOTWIRE IT.IF DONT WORK REPLACE BLOWER MOTOR.IF BLOWER MOTOR WORKS.YOU HAVE FAULTY CONTROL SWITCH OR MODULE.BESURE TURN OFF RADIO FIRST YOU NEED TO REMOVE NEGATIVE BATTERY CABLE.WAIT 15 MINUTES BEFORE WORKING UNDER DASH.THIS WILL DISARM AIRBAG AND BCM UNDER DASH.YOUR BLOWER MOTOR UNDER DASH ON THE PASSENGER SIDE FAR TO BACK.YOU NEED TO REMOVE BOTTOM PANEL TO GET TO IT.
CHECK HEATER AND AC IGNITION 10 AMP FUSE UNDER HOOD JUNCTION BOX.IF ALL IS GOOD CHECK BLOWER MOTOR FUSE AND RELAY.IF ALL LOOKS GOOD. TURN ON CONTROL SWITCH TO CHECK TO SEE IF POWER GOING TO BLOWER MOTOR IF YES BLOWER MOTOR BAD.IF NO POWER GOING TO BLOWER MOTOR FUSE AND RELAY GOOD.YOU HAVE BROKE WIRE BETWEEN SWITCH AND BLOWER MOTOR OR CONTROL SWITCH FAULTY. TO GET TO BLOWER MOTOR ITS LOCATED UNDER THE DASH ON PASSENGER BEHIND GLOVE COMPARTMONT YOU DONT HAVE TO REMOVE GLOVE BOX ITS JUST BELOW IT FAR BACK.YOU NEED TURN OFF RADIO FIRST THEN DISCONNECT NEGATIVE BATTERY CABLE WAIT 20 MINUTES THIS DISABLE AIRBAGS AND THE BCM.REMOVE BLOWER MOTOR HOTWIRE IT TO SEE IF ITS WORKS. IF NO BLOWER MOTOR NO GOOD.IF BLOWER MOTOR GOOD THE AC AND HTR CONTROL SWITCH IS BAD DEALERSHIP FIX.
fuses are the easy thing to check just pull one and look at it if you see a burned spot replace it, checking relays and blower motor resesters and blower motors are harder if you dont know how to do it. there best left to a shop to check.