For your front heater, besides checking or replacing = the relay, you might test the blower switch in the dash heater control = before taking out your heater (to get to the blower fan itself). The dash switch = is inexpensive, under $10, available from Bus Depot I think (I got one = quickly from my local VW dealer). It is a simple 3-position plus off = switch that routes the current to the various resistors (or no resistor) which are located near (I think)the blower motor itself. Probably can't open up the switch to spray it out, but it is fairly = easy to get it out of the dash (under the heater controls cover plate where it = clips in from the front). See Bentley 97.116 (if you have it) for the = wiring diagram and 80.14 for a picture of the heater with series resistance = wiring to the fan motor. You can get at all the relays easily (one screw out = of the fuse box to drop it down to access the relays which mount above the = fuses) but I don't see how you could get at the front blower motor without taking the = dash out and the heater apart.