No hot air

[dockermel]

as above really my heater just blows cold/luke warm air on hot setting and even if you put the front windscreen dimist button still no hot air..:zx11: what should i look for?? thanks. starting to get a bit pi--ed off with this car as it has so many faults:zx11:

[Issac Hunt]

Does the engine warm up properly?

You need a fault code scan to point you in the right direction. It's just guesswork otherwise.

[allanmb]

Is this when you first turn the car on? Or does it always do it? First thing I would check is the radiator fluid but without more info it's difficult to diagnose.

[nevo]

Its either the heater matrix blocked/air locked,have a feel up by the clutch pedal,look for two silver pipes see if they're hot when the engines up to 90 degrees,then as suggested already get the aircon scanned for faults your heater motor flaps may be sticking.

[dockermel]

the air con works fine.. lovely and cold. will try the pipes by the clutch pedal when i have a mo.. anything else i should try? the car warms up ok no problems there..just no hot air from the heater..

[nevo]

If the matrix is ok you still need the aircon scanned it controls the heat too.

[dockermel]

do i need to have the heater on when i feel the pipes by the clutch pedal and how do i get rid of any airlocks in the system??i know nothing about cars so need in depth info and pics if possible.. thanks

[RMH1]

stollen from bez off another forum .

flap motors
scan with vcds
or glovebox out and switch in turn and watch for them to work
they get stuck alot
and with you not useing then alot could be the case

[dockermel]

if they are stuck is it a dash out job to repair or do they have to be replaced?? thanks

[nevo]

Its unusual for both sides to stick together,you could take the glove box out and watch the red lever operate,(thats the heat for passenger side) but you said you have no heat for both sides and the demister! You've got more fundamental I think than a flap motor.Airlocked matrix can be a bitch to clear,If you have limited knowledge and tools It might be advisable to use a garage.

[gernarrdo]

Now going through this fault on mine, Always blowing A/C cold air unless on ECON at which point it was ambient. I have had to stop fault finding to go back to sea.

Got this far:

Put my had in the passenger footwell and looked for servos- you can see 2, 1 red and 1 blue. Press the raise temperature button and the red servo should move the lever inwards to open the flap to heat and outward to cold. If there is no movement then your Servo is not operating.
I managed to remove mine in situ with a 6mm spanner, you can access/remove 2 of the 3 bolts with a little dexterity, the third I will leave you to decide. Once removed, I manually moved the flap inward and got heat straight away. I tested the Servo with a 12 volt supply and it functioned in both directions.
When i get home I need to test whether the potentiometer in the Servo is faulty or check that the Climatronic is giving an output to the Servo.
Incidentaly my demister servo is not working either.
If you do a forum search, you can find how to do a self test on the Climatronic and the relevant fault codes. Mine told me that I had 3 servo faults several months ago, but it's taken me this long to get around to it.
Also check this other thread http://www.ukpassats.co.uk/phpbb/viewtopic.php?f=8&t=40308
I Need to source a B5.5 wiring diagram next.
Good Luck

[dockermel]

:Dtook my motor too a mates garage. put a hose throu the in/out pipes for the heater. seems to be working now. the heater gets hot but seems to take a while.. a lot better than it was,could have been crap in the matrix..:biglaugh:

[RSEscort]

Hi All,
very

[RSEscort]

hi All,
Very intreasted in this thread, I have a late 2005 A4 1.9TDI 115BHP, started blowing cold air, building excess pressure in the cooling system and using coolant, after several several checks and consultations with some others failing head gasket was diagnosed, :Blush2:I took the head off, got it pressure checked it for cracks, and had it skimmed, new gasket and bolts used (genuine Audi) rebuilt head and fitted it - car running fine, no pressure & still no heat for about 1000Km then loads of white smoke and using coolant quickly!!!:zx11: tracked it down to the exhast gas cooler on the inlet manifold :Blush2: looks like there was nothing wrong with the gasket in the first place in my book, fitted a new cooler unit (gen Audi) Engine running fine BUT still no heat :zx11::zx11: feed pipe to heater matrix piping hot but outlet pipe cold, with engine running and up to temp i have no flow in the outlet pipe, if i drive the car, leave it running and move out the pipe (top one - outlet from heater matrix)to allow air bleed out through the little bleed hole in the hose i appear to get all the air out, but no matter how many times i do it within 10 min heater is cool again and there is no flow in the pipe if i remove the hose !!!
at this stage its driving me mad --- anyone any thoughts ????:confused::confused::confused:

[BrendanMCorr]

I have this problem too.
My car is a 2004 FSI, when i bought the car a few months ago I felt the heating wasn't up to scratch. Three weeks ago I had the car serviced and when It was returned to me I was advised that the coolant was too low. I drained approx 2.5 litres and added the G12 coolant, bled it through. Since then I've had to bleed it every other day, the matrix is not getting full flow and the top pipe, outlet has an airlock in it. I bleed this out anf the car will heat for the next short journey, then run cold on the next, while driving it can get warm but when you stop moving the residual heat in the matrix is lost quickly due to the fan blowing hard and the air runs cold. The only thing I can think of is that the matrix has been full of air. I'm now at the stage where I'm thinking of draining the system and starting from scratch as i've bled enough air out as to add another 2 litres of coolant, considering the system only holds 7 litres, or could it be something else, I was even at the stage of head gasket blowing into the coolant but then the air would be fumes and it isn't, also removing the coolant cap while the engine running shows no bubbling and no other head gasket symptoms. Anyone got any other ideas.

[Jamz74]

Did you fix this mate?
Sorry it's quite an old thread hope your still here!

[TdiBlacky140]

I have this problem too.
My car is a 2004 FSI, when i bought the car a few months ago I felt the heating wasn't up to scratch. Three weeks ago I had the car serviced and when It was returned to me I was advised that the coolant was too low. I drained approx 2.5 litres and added the G12 coolant, bled it through. Since then I've had to bleed it every other day, the matrix is not getting full flow and the top pipe, outlet has an airlock in it. I bleed this out anf the car will heat for the next short journey, then run cold on the next, while driving it can get warm but when you stop moving the residual heat in the matrix is lost quickly due to the fan blowing hard and the air runs cold. The only thing I can think of is that the matrix has been full of air. I'm now at the stage where I'm thinking of draining the system and starting from scratch as i've bled enough air out as to add another 2 litres of coolant, considering the system only holds 7 litres, or could it be something else, I was even at the stage of head gasket blowing into the coolant but then the air would be fumes and it isn't, also removing the coolant cap while the engine running shows no bubbling and no other head gasket symptoms. Anyone got any other ideas.


I'd like to know what the fix was for the original poster too, perhaps you could enlighten us!