Air Con 2 Issues

[Comhander]

I have a 2001 Mk11 2.3 Auto Galaxy with Air Con fron and Rear (Climate Control). Recently the Air Con made a horrible noise from the Compressor location and caused the engine to stall. Since then when switching to auto mode it makes no difference to the blower temperature (ambient). The electrics to the Compressor seem fine and on running the engine whilst examining the Compressor nothing happens to the spindle to engage the clutch. I therefore suspect the Compressor.

Is there any way to test this further or should i just replace the Compressor and get it regassed?

 

The other fault also Air con is that a diagnostics reading suggests a problem with the Recirculation valve/flap.

Anybody know where this is and how to go about changing/testing this?

 

Any help appreciated as I need Aircon!!!!

 

 

Thanks

[f0ster]

hello

when you say that the electrics to the compressor seem fine, have you tested the supply to the compressor mag clutch,

when the air con is selected, the mag clutch on the front of the compressor requires 12v to activate, most manufacturers I have dealt with can supply the mag clutch seperatly, if the clutch has failed you need to see if it is caused by bearing failure or possibly the compressor siezing up,

[gregers]

or if the clutch plate is sitting in your under tray?

[Comhander]

hello

when you say that the electrics to the compressor seem fine, have you tested the supply to the compressor mag clutch,

when the air con is selected, the mag clutch on the front of the compressor requires 12v to activate, most manufacturers I have dealt with can supply the mag clutch seperatly, if the clutch has failed you need to see if it is caused by bearing failure or possibly the compressor siezing up,

 

The clutch plate moves freely by hand, the splines are good and there is power going to the connector to the sie of the pulley. The Compressor pulley has no play. Not sure what else I can say.

 

Thanks

[NikpV]

hello

when you say that the electrics to the compressor seem fine, have you tested the supply to the compressor mag clutch,

when the air con is selected, the mag clutch on the front of the compressor requires 12v to activate, most manufacturers I have dealt with can supply the mag clutch seperatly, if the clutch has failed you need to see if it is caused by bearing failure or possibly the compressor siezing up,

 

The clutch plate moves freely by hand, the splines are good and there is power going to the connector to the sie of the pulley. The Compressor pulley has no play. Not sure what else I can say.

 

Thanks

how do you know the splines are ok - did you take the clutch plate off?

 

BTW if any of you reading this thread has a decent clutch plate of the splined variety (mk1 tdi had a keyed type) I would be very interested thank-you

Edited April 8, 2009 by NikpV

[rjhwuk]

If there is a good supply to the clutch and the end plate does not spin when the a/c is switched on then the clutch coil has probably burnt out due to overheat when the compressor seized. To check if there is a good supply use a filament test light. That will draw a good current and will not glow if there is a poor supply.

 

If you have a meter then a good clutch coil should have a restistance of between 4 and 8 ohms.

 

The recirculation flap is in the heater plenum.

 

Hope this helps, RHW

[mikej]

Can i just ask why you think you have aircon in the rear as well as in the front , do you have vents in the roof at the rear as well ? :(

[Comhander]

Hi

 

I've changed the compressor, Recon for

[Ivor_E_Tower]

IIRC the flashing display will not automatically reset and needs to be accessed by VAG-COM to stop it from flashing. I may be wrong here, but I am sure that I have read this in the past. VAG-COM will also tell you if the flap is still faulty... could be that the display was flashing because of your compressor fault Edited May 8, 2009 by Ivor_E_Tower

[mikej]

Strange to see your display is still flashing, although mine has flashed on startup everytime there is a fault with the gas pressure, once the system is sorted and regassed it has always cleared straight away ? :lol:

[Comhander]

IIRC the flashing display will not automatically reset and needs to be accessed by VAG-COM to stop it from flashing. I may be wrong here, but I am sure that I have read this in the past. VAG-COM will also tell you if the flap is still faulty... could be that the display was flashing because of your compressor fault

 

 

Hi

 

Didn't think VAG-COM works with petrol engines?

 

The fault readings were done when I had the Gearbox rebuilt and this suggested the recirculation flap was showing a fault. I presumed this to be the reason for the flashing panel and prior to compressor failure the air con worked fine with the fp. I'm not sure how to get to the recirc flap, which I am told is in the heater plenum, or what I am expecting to see?

[big_kev]

Didn't think VAG-COM works with petrol engines?

 

The fault readings were done when I had the Gearbox rebuilt and this suggested the recirculation flap was showing a fault. I presumed this to be the reason for the flashing panel and prior to compressor failure the air con worked fine with the fp. I'm not sure how to get to the recirc flap, which I am told is in the heater plenum, or what I am expecting to see?

 

Vag-Com won't speak to the engine but will to almost everything else including the aircon.

 

You need to check the flap to see if it physically moves when switching between recirc and normal.

[LA1982]

Didn't think VAG-COM works with petrol engines?

 

The fault readings were done when I had the Gearbox rebuilt and this suggested the recirculation flap was showing a fault. I presumed this to be the reason for the flashing panel and prior to compressor failure the air con worked fine with the fp. I'm not sure how to get to the recirc flap, which I am told is in the heater plenum, or what I am expecting to see?

 

Vag-Com won't speak to the engine but will to almost everything else including the aircon.

 

You need to check the flap to see if it physically moves when switching between recirc and normal.

 

Can anyone tell me where to find AIR FLAP on MK2 2001 TDi..???

I keep getting one fault code and I can feel that Air Con is not working(just re-gassed):

1 Fault Found:

 

01596 - Motor for Outside/Recirculated Air Flap (V154)

 

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