by CumminsPower59 » Tue Dec 30, 2014 2:38 pm
If the blower is working on the other positions but not defrost or heat, but on others, it sounds like the dash unit is bad...to me anyways. If the blower was working on all positions, but nothing coming out of the defroster vents but out the other locations, that would indicate that there is a malfunction with the blend doors or the vacuum system that controls them.
Ike
91 W350 SRW, 3.07's, NV4500, 370's, THD LPPP, Super HX40, 2nd gen IC swap, BHAF, Isspro's, 2" lift, 285's on 3rd gen 17"'s.
04 VW Jetta Wagon TDI 5speed