Air con problems

Rollerdan

Active Member
Apr 22, 2014
29
0
Hi guys i have a 1.6 ibiza tdi cr , and recently the air con has just stopped , tried to regas but made no difference , no leaks in the system either , also i cant hear the pump kicking in like before . Also looking at the pump pulley the little torx bolt seems to be sticking out slightly is this normal? This does not tighten up at all , also the clutch on the pump pulley does not turn when air con is activated the whole pulley turns constantly with aircon off or on ?

Anyone have any ideas ? Pressure switch or pump broken ? Its 2009 53,000 miles
 

RUM4MO

Active Member
Jun 4, 2008
7,784
983
South Scotland
There is no clutch in these compressors, they are always driven, but the duty cycle for refrigerant delivery is very low when not required - though there is a "rubber" shear coupling to allow the auxiliary belt to keep turning if/when the compressor seizes.

Best plan will be to get any fault codes checked if possible, and take it from there.

One final point, you will get more responses if you re-post this into the main forum area as this area is for amassing "Mk5 Ibiza FAQ's (6J)".
 

Rollerdan

Active Member
Apr 22, 2014
29
0
There is no clutch in these compressors, they are always driven, but the duty cycle for refrigerant delivery is very low when not required - though there is a "rubber" shear coupling to allow the auxiliary belt to keep turning if/when the compressor seizes.

Best plan will be to get any fault codes checked if possible, and take it from there.

One final point, you will get more responses if you re-post this into the main forum area as this area is for amassing "Mk5 Ibiza FAQ's (6J)".


Thank you for the reply mate , had it plugged into a diag machine no codes present ? Will i only see somthing if i use vagcome or somthing like that?
 

RUM4MO

Active Member
Jun 4, 2008
7,784
983
South Scotland
VAG-COM (or VCDS) or the official VAG dealer's diagnostic system should show up any logged faults as the air con controller is a "smart" module, the fully automatic air con systems should also be able to self diagnose, one of the reason I spec'd fully automatic in my wife's Polo 9N - though that is a mute point as I now have VCDS to do it for me.

I'm not sure how clever the more basic air con systems are in being able to report faults that VCDS can read - makes sense that they should be good enough to check for HI/LO pressure - while I'm on here, exactly how did you recharge the system, how did you check that the gas charge was too low? Over charging a "full" system will lead to high pressure trips, or not operating, these small systems need to get critically charged, ie not too tolerant of someone just throwing in a lump of liquid to see what will happen.
 

Rollerdan

Active Member
Apr 22, 2014
29
0
VAG-COM (or VCDS) or the official VAG dealer's diagnostic system should show up any logged faults as the air con controller is a "smart" module, the fully automatic air con systems should also be able to self diagnose, one of the reason I spec'd fully automatic in my wife's Polo 9N - though that is a mute point as I now have VCDS to do it for me.



I'm not sure how clever the more basic air con systems are in being able to report faults that VCDS can read - makes sense that they should be good enough to check for HI/LO pressure - while I'm on here, exactly how did you recharge the system, how did you check that the gas charge was too low? Over charging a "full" system will lead to high pressure trips, or not operating, these small systems need to get critically charged, ie not too tolerant of someone just throwing in a lump of liquid to see what will happen.


The only a reason why I took it for a regass mate was because I thought it ran out as it just suddenly stopped working one day , so they regassed it and told me that there was still enough in there too make it operate , also the oil was was fine too , so he topped it up slightly to see if that would do anything but nothing changed , there is a bolt on the aircon pump pulley that seems to be poking out a little bit but I don't know if it's ment to be like this? I've tightened it up but nothing happened it just span and span , think il need to you vagcom or somthing to pick up the codes if that fails il take it to an aircon specialist to see what he makes of it , I see it's very common for the mk4 ibiza pumps to break but I cannot find any info on the mk5 whatsoever . Thanks for the replys
 

olie93

Active Member
Jun 7, 2014
74
3
Whittlesey
HI,

I seem to have exactly the same problem. I have scanned the car using VCDS and have no error codes logged at all across the whole car. I've also used the measuring blocks and it seems that the air con pressure is fine, the compressor codes say that the unit is turned on. I have also check the temperature of the pipes in the engine bay and both the inlet and the outlet pipe are exactly the same temperature instead of one hot and one cold.

Did you manage to find anything more out?

Olie
 

Rollerdan

Active Member
Apr 22, 2014
29
0
HI,



I seem to have exactly the same problem. I have scanned the car using VCDS and have no error codes logged at all across the whole car. I've also used the measuring blocks and it seems that the air con pressure is fine, the compressor codes say that the unit is turned on. I have also check the temperature of the pipes in the engine bay and both the inlet and the outlet pipe are exactly the same temperature instead of one hot and one cold.



Did you manage to find anything more out?



Olie


Hi ollie in all honesty mate ive given up , i have no clue what to do next ! If you find out keep me posted !
 

olie93

Active Member
Jun 7, 2014
74
3
Whittlesey
well i got the issue fixed. Turns out it was a faulty compressor. My local seat dealer replaces it for £470 and now its ice cold

:D
 

nightflight

Active Member
May 18, 2009
2,677
12
Sheffield
What a coincidence, mine is also a 2009 1.6crtdi and the aircon compressor went at 52k.
My local dealership quoted me something like £1100 for parts and labour!

Managed to find a new part on eBay for £175 (same part as the mk4) and the dealership are fitting it for £300.

Would be nice if this expense hadn't come at all, especially not just after two new tyres, a service which flagged up the need for another two tyres and rear brakes and pads but hey ho, at least it'll eb cold again!
 
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olie93

Active Member
Jun 7, 2014
74
3
Whittlesey
It is annoying that these units are failing so soon. Before my ibiza i had a 55 plate VW polo to which the air con compress hasn't been replaced and is still working.
 

DEAN0

Old Git
Feb 1, 2006
5,288
300
Preston - UK
I've only had the car just over a month, but i would turn it off if it wasn't needed yes.

I work for a company that does refrigerated air driers.
We find that those who switch it off over winter have all the problems.
The compressors end up dry and then break.

Best option is to leave it running and let it control the temp as intended.
 

nightflight

Active Member
May 18, 2009
2,677
12
Sheffield
I tried to make a point of turning it on fairly regularly, over winter it was handy to clear the windows quickly, but this time I'll just be leaving it on full stop.
 

Pyrres

Ibiza Cupra -14
May 2, 2014
299
0
Finland
It should not even activate under certain temperatures (under 5-10c). So its actually getting dried up in tye winter and it ends up breaking. In the winters its best to use it maybe once a couple of weeks for a 10-15mins. For example drive to a warm car park and put the aircon to its coldest setting and let it run for a while.
 
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RUM4MO

Active Member
Jun 4, 2008
7,784
983
South Scotland
Guys, the compressor fitted to all these cars, Fabia, Polo 9N> and Ibiza 6L> are running and pumping the R134a all the time the engines are turning. It is just that they are, I think, variable displacement type units, which means on high demand, they pump a lot of gas and during low/no demand, they pump a small ammount of gas. This design, is meant to, as much as other things, make sure that there is always a hint of oil mist passing through the system - and so the seals stay "alive". I don't want to temp fate, but my wife's late 2002 Polo 9N, owned from new and now at 100K+ miles, only ever gets its compressor cooling function enabled as and when needed - and it still blows cold air when asked to.

In other words, disabling the compressor should have no effect on its reliability.

Is there a clutch sort of thing on the alternators of these 1.6 TDI cars, if they fail, they might annoy the compressor a bit.
 
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