[A4] Heater Issues

[Gordie's Garage]

Phil, I just had the same work done, and more, on my 98 A4 1.8T and
experienced the same temp gauge issue.  I'm certain that it was air and it
is fine now.  No problem with my heat though, and here in Michigan, I
certainly would have noticed it immediately.
I've never had a prob with my AC head unit on my car, nor have I heard of
anyone having that problem.  Certainly is not beyond the realm of
possibility though.

Gordie
98 A4 1.8
03 A6 Avant
Couple of old MGs


> Just had the timing belt job done on my 01' 1.8T, at a 
> supposedly reptuable independent shop.  Immediately after, 
> the cabin heater doesn't heat up.
> Also for about a week, the water temp gage looks like it has 
> a bad sensor or maybe an air bubble: needle jumps between 
> cold and midway even after warm, but this eventually goes 
> away and works fine after I bleed the air a few times.  After 
> bringing it back for the heater issue, they tell me that hot 
> water is circulating just fine, temp sensors are fine, the 
> heater flap motor is responding to their VAG-com fine, but 
> they suspect that the AC head unit is bad.  During use, the 
> AC head unit seems to work fine, except for the lack of hot 
> air coming out of the vents.  This sounds reasonable enough 
> to me, but the timing with the TB/T-Stat/H2O Pump job and the 
> temp gage seems wrong to me.  Has this happened to anyone?  
> Any ideas?  Any things to check before I order (and change 
> myself) the big $$$ AC head unit?
> 
> Thanks,
> -Phil