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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old December 1st, 2010, 13:40   #1
stang66007
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Default 00 beetle little to no heat

engine runs at operating temp but changed t-stat anyways. no change. I have little to no heat coming out off the vents. 130K on car. Do they have problems with the blend doors on these?
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Old December 1st, 2010, 13:41   #2
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Ever noticed any black foam blowing out of any vents?
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Old December 1st, 2010, 13:43   #3
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There is a cable that connects the knob to the blend door. If the cable anchor at either end has come loose, then the blend door won't change position when the knob is turned.

-Rich

OH: Has the sound deadening in these been blocking things up?
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Old December 1st, 2010, 14:04   #4
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If Rich is correct, it is a PITA to access those controls. May/June/July of '09, I did a write-up how to access the heater control system..... do a search and find it. Also, others have written some pretty good stuff on this issue!
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Old December 1st, 2010, 15:24   #5
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I looked under the dash & the cable seems to be moving the door both ways. I do have foam in the vents. It seems to blow out defrost, vents, and floor at same time.
AndyBees, I haven't found the writeup yet, but will keep looking.

I decided to try adjusting the cable a little also.
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Last edited by stang66007; December 1st, 2010 at 16:07. Reason: last sentence
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Old December 2nd, 2010, 04:20   #6
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You need a new center HVAC case... blowing foam is the smoking gun. That sucks.
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Old December 2nd, 2010, 05:26   #7
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Sent you a PM. Thanks Steve
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Old December 2nd, 2010, 13:47   #8
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Are the parts only available from the dealer?
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Old December 2nd, 2010, 14:03   #9
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I have never seen anyone else carry the HVAC case. They are not that expensive on some cars, depending on if it is all one piece with the blower case or not. If it is all one piece, it costs more.
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Old December 2nd, 2010, 17:39   #10
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Default Is it a manual or auto/tr.?

Manuals have 3 heater plugs on the end of the head. Auto/tr. cars don't use them. Could be bad relay or plugs, They are bigger than glow plugs that start the eng.
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Old December 2nd, 2010, 17:58   #11
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Quote:
Originally Posted by gt View Post
Manuals have 3 heater plugs on the end of the head. Auto/tr. cars don't use them. Could be bad relay or plugs, They are bigger than glow plugs that start the eng.
This is correct information, but I do not think they will make a difference in this case.

It sounds as if he needs to replace the blend door foam. The doors are simply latticework and once the foam is destroyed, you cannot properly control the heat and AC.
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Old December 3rd, 2010, 13:17   #12
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you can pull most of the dash, leaving the main part of it in place, unbolted, so it can be shifted...then you can remove the front defrost/floor duct...from there you have just enough room to access both blend doors and glue something to them.....I just did this job on a NB and it was a PITA!!...but I did not have to dump coolant or evac the AC system...I measured the blend doors carefully, cut some vinyl to fit and glued it vinyl side to the doors (fabric back out) ....my arms and hands were covered in glue but the end result was cook you out heat
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Old December 3rd, 2010, 13:21   #13
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let me also add that another way to diagnose this (besides no heat) is that the blend doors will make a distinct metallic ring (blend doors are constructed of galvanized swiss cheese) when they reach the stop in either direction...after they are successfully recovered it dampens the sound
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Old December 3rd, 2010, 13:22   #14
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Quote:
Originally Posted by jimbote View Post
you can pull most of the dash, leaving the main part of it in place, unbolted, so it can be shifted...then you can remove the front defrost/floor duct...from there you have just enough room to access both blend doors and glue something to them.....I just did this job on a NB and it was a PITA!!...but I did not have to dump coolant or evac the AC system...I measured the blend doors carefully, cut some vinyl to fit and glued it vinyl side to the doors (fabric back out) ....my arms and hands were covered in glue but the end result was cook you out heat

And this is the same sort of story I have heard from several people who have done the job. SteveKris, Richard55...Richard55 was working on a HOW-TO, but got sidetracked when an inner tie rod fell off...
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Old December 3rd, 2010, 13:26   #15
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Yeah, some folks have had good luck fixing them. I have never been brave enough to try that myself.
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