a4 b6 2004 1.9tdi heater core.

[trik]

Hi all.

how you doing.?

am i correct.... ?

in the car the heater dont blow warm / hot air, cold yes.

i presume  the thermostat is working, we plugged the car in before to test if any codes came up for anything ..came with a code for map sensor, but nothing else.

so i looked over a page & seen that...

if the heater is not blowing warm / hot air, then a heater core flush will probably fix issue.

to do this, do i just take the  pipe's off to the heater under the bonnet connect 1 to a hose going to a tap & the other to a run off hose. then push water though it slowly until it runs clean.

Then do it again but changing the pipes around.

then when ive done this put the 2 pipes back on the heater core.? 

how would i bleed  the system then tho..?

doing the above is this a heater core flush.?

you think it will fix my issue.?

thanks all for any help.  

 

[Magnet]

Hello Kirt,

It is simply an assumption that the heater core is blocked, and if it is, then it would be reasonable to suspect that the main radiator core is also partially blocked, since cores only get restricted following years of 'abuse' via. not renewing the coolant. 

Personally, I would be wanting to eliminate the heater controls as being the problem before suspecting the heater core. 

Kind regards,

Gareth.

[trik]

hi magnet, thanks for reply & help.

il be going at it the wk-end (if its not to cold outside, or raining), 

hope the heater unit asn't gone, dont really want to remove it, seems a bit of a pain.

il probably go try flush it 1st & hope all goes well.

yes, that's what one of the lads said to me ...as a lever or something come off the heater controls at the back.?

i have a camera thing thats on a 6ft bendy cable thing which connects to a small visual screen & it lets you look into small spaces. (inspection camera are the called). il have look with this & see if i can see anything strange.

il let you know what happens.

thanks again for help & advise.

talk to you soon 

[Magnet]

Well Kirt, it seems flushing it you are going to do! .. I wish you success. 

I think you will find that the days of mechanical levers and controls for heating selection are gone, and have been replaced by electronic controls - that is why I suspect this to be associated with a control problem rather than a heater core circulation issue. 

Still... Let's hope you are right. 

Kind regards,

Gareth.

[trik]

how you doing gareth mate.?

hahaha☺️... you made me laugh a bit then,  (thanks, been boaring day at work) ..  ...the days of mechanical levers and controls for heating...☺️

yes...im still in the days of the old mk2 ford escort ...etc. etc.. this a4 is my dad's car,  he's rubbish with computers or pc's, so i joined this audi site for a heads up / help or to see what others have done or how they aproach the / a job. then we i go down to the parents il have an idea what my dad is saying or doing. 

again thanks for the reminder & the laugh.

I have the 530 e61 bmw.  but i like doing jobs with the dad,.. & car / mechanics are intresting tho.

you ever done the flush or controls your self.?

talk to you soon.. 

 

happy halloween mate. 

 

[leenowell]

Hi

I have the same issue in my 2004 A4.  I noticed mine has been losing water (not sure where from) and when I looked at it at the weekend there was a load of air trapped (I assume I had let the level drop too low or maybe wherever the leak is it is suckign in air or something). My fix was to bleed the system at the heater matrix. Assuming yours is the same, the top pipe is the return pipe (from the heater matrix) and has a tiny hole in it between the clip and the end. All you need to do is take the clip off and slide the hose back until the air (or water  or both) comes out of the tiny hole. You don't pull the hose fully off. For me this restored heat but it could be hotter so will flush it this weekend. 

If this doesn't help you could take the same hose out and see whether water is being pumped through the matrix. 

 

Let me know how it goes 

[trik]

how you doing lee mate.

if it wasn't for you relpying i would of totally forgot.

but yes, this car is my dad's 7 with the weather now cold out, you need warm air / warm car. 

wear hat scarf with driving gloves are back the 80's. 

when i went down the parents we took the 2 pipes just on the passenger side of the battery (uk cars) going into the heater, then flushed it out, there was a nice bit of crapy water come out, put the pipes back on. & the next time i spoke to my dad (day or 2 after) he said that there was heat & it was bit better.

the next thing he did say that he got his hand up the  back of the dash & 1 of the air pipes going to the top (i just thought he means either the window screen or the car people vents) was not completely on, & he pushed it on & that the heat is much better.

when he brought the car (think it was around april this yr, 2018)  got it with no nct / mot or tax, & there was 1 or 2 problems with it (nothing major).

the problems was, 1 the engine mount' was broken. 2 the water was going. 

could tell mount' was gone,  he put car in 1st gear & i was on the floor looking basiclly at he sump, so when he come off the clutch the whole engine jumps back. this was quick fix (not expensive for new part).

the water lose.. couldn't find this. the head is ok. no tell tail signs. hose's ok (clips..), the carpets ok. , (i brought a an inspection camera about 2yr ago, its ok,its handy) so i was under the car with the camera, right  at the back of  engine theres a black plastic housing with 3pipes on, this looked like there was a slight drip (when i say a drip, i mean like 1 plop of a drip may-be every ...week... lol,  but when the engine is hot the water would drip a lot easier.

we took this black housing off, cleaned the old gasket of & re-fitted with new gasket paper & still to this day its never given a days trouble & no water lose.

the dad love's this car, 1.9 130bhp say's its a little flier. 

we just done the time belt & water pump about 2 - 3 weekend's ago. basically got a clean bill of health. he done the oil not so long ago as-well.

any how's thanks for the reply lee, talk to you again soon.

 

[leenowell]

Thanks for the reply.  How did you attach the hose pipe to the heater core to do the flushing? Also, any idea where he out is hand to find the hose had fallen off? Wonder if this is also part of my problem as putting it on windscreen demist doesn't blow that much air 

 

Thanks

 

Lee 

[trik]

hi lee,   ye..  he got a old hose that was the same size & put that on with another on the other side so water wouldnt go all over the place. 

were or how he got his hand to the air pipe inside the car, sorry i dont no. but i be speaking to him soon.., il ask him how he done it & let you no.

but ye, what you said,, doesn't blow much or any thing at the screen ...sounds how dad used to talk about his car sometimes.

talk to you mate.