Climatic probs

meeker855 · Post by **meeker855** » Mon Aug 20, 2007 4:17 pm

Everything is going well with the tdi apart from the climatic control!

The snag - Although the fan works and the speed can be controlled the temperature is always on cold, even if I switch it up to max heat it will still blow out cold air.

A few weeks ago it was blowing out hot air uncommanded... now its just cold all the time!

I've been reading about the flap motors which direct hot air into the cabin and was wondering if this colud be the problem.

Cheers for your help, Paul.

dino · Post by **dino** » Mon Aug 20, 2007 4:54 pm

My Climatic is starting to really bug me. If on a cold setting it will sometimes briefly blow out very hot air (maybe just to bring the temp back up to the set temp but i mean it gets very hot! I open the window just a crack to let the hot air out and then it starts blowing cold again - very strange!

Anyone else's do this?

GaryUK · Post by **GaryUK** » Mon Aug 20, 2007 5:24 pm

Mine does this also

It seems to get the right temperature after a bit of fiddling with the dials though.

meeker855 · Post by **meeker855** » Mon Aug 20, 2007 6:29 pm

Mine used to do the hot thing and it did get very hot!

Now its just stuck on cold, not too bad at the moment but when winter hits i'll be fooked!!

poloecosse · Post by **poloecosse** » Mon Aug 20, 2007 6:45 pm

mine does the hot thing randomly, very annoying

Post by **alexperkins** » Mon Aug 20, 2007 8:16 pm

I beleive its called the differential valve or something along the lines of that. Happened to my dad in both his passat and the merc. Also has happened to my friend with a 9n

Its the valve that intermixes the air to choose which is hot and cold - fairly simple to fix. Just needs a new one

meeker855 · Post by **meeker855** » Mon Aug 20, 2007 11:39 pm

I think thats the valve I was reading about.... sounds like its stuck at full scale cool.

Now to find where it is and a part no. for a new one!

Any ideas, anyone got a haynes/anything that would give some info?

Cheers!

dino · Post by **dino** » Tue Aug 21, 2007 9:49 am

meeker855 wrote:I think thats the valve I was reading about.... sounds like its stuck at full scale cool.

Now to find where it is and a part no. for a new one!

Any ideas, anyone got a haynes/anything that would give some info?

Cheers!

i'll look in my haynes later to see if i can find any thing.

Post by **alexperkins** » Tue Aug 21, 2007 9:50 am

I dont think haynes manual covers the air flow system in that depth - youd need a technicians service manual as its part of the air conditioning unit itself. VAGCOM may even be able to diagnose the fault.

AKs_SlickPolo · Post by **AKs_SlickPolo** » Tue Aug 21, 2007 10:26 am

I get this problem of having the hot/cold air randomness thing but its very rarely.

I did a scan of my Heating/vent/Aircon module last week and it came up with the following fault codes:

Address 08: Auto HVAC
Controller: 6Q0 820 045
Component: Klimaanlage

3 Faults Found:

01596 - Motor for Outside/Recirculated Air Flap (V154)
30-10 - Open or Short to B+ - Intermittent
01596 - Motor for Outside/Recirculated Air Flap (V154)
41-10 - Blocked or No Voltage - Intermittent
01596 - Motor for Outside/Recirculated Air Flap (V154)
29-10 - Short to Ground - Intermittent

Don't have no other issues with mine, so I would think its to do with something about the air flap motors. I've cleared the fault codes as its intermittent and i'll see how quick they come up again before I try to sort it out.

flyfs6 · Post by **flyfs6** » Tue Aug 21, 2007 1:10 pm

Hey

Sorry to learn that the car has developed a fault and not really impressed that its decided to play up now.

IIRC air con system is covered by the extended warranty - have they sent your new documents yet?

Nothing to do with this thread, but how is it reacting to different fuel? Assuming you cant get Vpower diesel there, what fuel are you running it on?

meeker855 · Post by **meeker855** » Tue Aug 21, 2007 3:54 pm

flyfs6- I've got the docs for the warranty. Don't know if these flap motors are specifically covered though.
I've only had to fill her up a couple of times, I've been struggling to find V-power so am using normal shell diesel and redex additive.

Slickpolo- getting VAG-COM on it tonight, will see what faults it brings up. By the sounds of it it doesn't sound like yours is a mechanical problem just the wiring to the motor. Will be ineresting to see what mine is.

Cheers for your help!

Buzby · Post by **Buzby** » Tue Aug 21, 2007 6:44 pm

Mine does the same thing sometimes, but I find that if I turn the blower off, wait and then turn the blower back on again it seems to sort itself out..

mikehowett · Post by **mikehowett** » Tue Aug 21, 2007 8:25 pm

If you guys want some exploded diagrams of the ventilation system let me know and I will get them off the Elsawin app I have

Although it doesn't provide any part numbers.

meeker855 · Post by **meeker855** » Wed Aug 22, 2007 1:14 am

That would be good mike, give me an idea of where everything is!

Played with the VAG-COM tonight and it brought up these codes-

01596 - Motor for outside/ recirc Air flap.

30-10 - Open / short to b+
29-10 - Short to ground

Does this mean that there's faulty wiring to the air flap motor or is the whole thing goosed? Guess thats where the VW guys come in!

Any more help would be much appreciated!