[Vwdiesel] Heater question

[Dave Cook]

I'm catching up on old emails, sorry...

I wasn't sure if the A2 Jetta setup was similar to my old Corrado or not, but sounds like it.  So...

On the Corrado, the heater acted just like this.  I discovered that for whatever reason (weight savings?  I dunno) the temp control door had 3-4 large holes and then the whole thing was covered with thin foam to seal it up..  My foam had degraded and blown out the vents as described.  If at least some of the chunks are rather large, then this is the problem. 

I fixed it while changing the heater core.  On the corrado, it is possible to split the HVAC box in half on the car, so the ac half can remain intact.  It is impossible to get two of the clips back on, but there are enough of the others that this doesn't matter. 

Anyway, I found 8x11 sheets of sticky-backed foam at Wal-Mart in the craft section.  I used that to seal up the door.

Also, placing the selector in recirculate did help warm up the car.  If the outside temp is lower than approx 40 degrees, the compressor wont come on.  However, with the air constantly recirculating, you will eventually get some condensation and have to switch on and off to defrost on a longer trip.  That would suck in some cool, dry air to clear the windshield.

Dave Cook


--- On Mon, 1/11/10, lbaird119 at aol.com <lbaird119 at aol.com> wrote:

> From: lbaird119 at aol.com <lbaird119 at aol.com>
> Subject: Re: [Vwdiesel] Heater question
> To: vwdiesel at vwfans.com
> Date: Monday, January 11, 2010, 5:36 PM
> In a message dated 1/11/2010 3:50:44
> AM Pacific Standard Time, 
> mikitka at embarqmail.com
> writes:
> 
> > Do I need to flush the heater core or is the missing
> foam my issue?
> > 
> 
>   Could be either or both.  It's easy to flush
> out the heater with 
> a garden hose.  Disconnect both ends flush one way,
> then the 
> other and keep doing it until it's clean and flows well (or
> replace 
> the heater core).  The heater core is where the
> smallest passages 
> are so if anything's a filter in the system, it's it..
>   The heat mix IS a flapper rather than a coolant
> valve like on the 
> A1 so leaking foam or a misadjusted cable, broken servo can
> all 
> make for a cooler heater.  You can put it into
> recirculate, by 
> putting the selector to the biggest snowflake on the A/C
> controls. 
> That would eliminate most cold, fresh air ingress and give
> you an 
> idea if it's the foam.  You'd want to unplug your
> compressor so that 
> you're not running the A/C though.  
>   It's not uncommon for the flapper controllers/servos
> to break, the 
> link come loose or the such.  Problably all vacuum
> controlled.  Not 
> a lot of fun to pull and foam.  Seems like I did while
> leaving the A/C 
> box in place but I have to be remembering that wrong.
>     Loren
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
>