Hey all,

 

Driving my 06 TFSI VRS in the heat tonight at 70mph with the windows down and aircon on, I suddenly heard a ticking noise from the front through my window. I took it out of gear, blipped the throttle and it went, but then the air gradually got warmer and warmer.

 

Now the pipes don't go cold at all (and there still seems to be a ticking noise from that area, not sure if it was there before or not) and the revs don't drop at all with turning it off and on, but I've never noticed it do that anyway. - here if anyone can have a listen:

 

http://youtu.be/5-rtT_B2_pU

 

Is it fairly likely to be the compressor shafted? If so is it a standard type across most VAG models from this era, such as this? http://www.ebay.co.uk/itm/Skoda-Octavia-1999-onwards-A-C-Air-Con-Compressor-1226P-/321162642335?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4ac6c9039f

 

I've unscrewed the cap and pressed the valve near the front left of the bay but there seems to be no pressure.

 

Are they normally DIY changeable? I'm a fairly competent mechanic.

 

Cheers.

Can't answer your question directly but note that compressor on eBay is a mk 1 part. I've been looking myself as I'm worried about a less pronounced and more of a 'whirry' (if that's a word!!) sound from mine. So I will keep an eye on this thread with interest.

Thanks

Adam

Yeah the mark 2 parts seem a fair bit more expensive. There's an original there for c.£300 which I may have to bite the bullet on, as long as I can fit myself it's not the end of the world.

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I found item ID:151081472831. Only 216 plus p&p so a bit less. Hope that helps

Bit more info.

 

Took it to local Tyre Sales (now just a part of Kwik Fit I think). They said it's leaking on the vacuum test.

 

The compressor RPM shows as 0 on the climatronic test.

Everything is still turning.

Apparently there's a pressure switch that will stop the clutch engaging the compressor when the pressure is too low.

 

I'm thinking that I just have a leak and yesterday the pressure just dropped below the threshold.

 

Sound reasonable?

 

Sound reasonable?

Everything aside from the clutch kicking in.

If you can get VCDS its a simple check to see if the compressor is operating as it should but sounds like you have a substantial leak if its failed a vac test.

Hi there, here was another thread with similar question. Found the advice useful on how to check if compressor is knackered. My compressor went 3 years ago where the cold was intermittent and it was expensive to repair. A common fault unfortunately on the 2.0TFSI.

 

http://www.briskoda.net/forums/topic/196338-air-con-not-working/

Everything aside from the clutch kicking in.

If you can get VCDS its a simple check to see if the compressor is operating as it should but sounds like you have a substantial leak if its failed a vac test.

Only got the free version of vcds. What blocks do I log?

Any way through standard obd2? I've got a Bluetooth obd2 dongle and phone app which allows custom pids.

Trying to find the nearside valve near the bulk head that a few people have reported as failing.

Or I don't mind paying to find the leak if it's someone recommended. Tech1e you're not far from me, any recommendations on local a/c specialists or dealers?

Thanks.

Only got the free version of vcds. What blocks do I log?

Any way through standard obd2? I've got a Bluetooth obd2 dongle and phone app which allows custom pids.

Trying to find the nearside valve near the bulk head that a few people have reported as failing.

Or I don't mind paying to find the leak if it's someone recommended. Tech1e you're not far from me, any recommendations on local a/c specialists or dealers?

Thanks.

You can't do it with VCDS lite or an obdII scanner, you need something that does can bus.

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Balls. OK thanks.

I have full VCDS in Malvern. This can do the compressor check.

I think the MK2 uses the clutchless variable displacement compressor, if it's out of gas and oil it'll probably need to be replaced. The noise sounds like the injectors.

Edited 21 July, 201312 yr by 07 vRS Taxi

I have full VCDS in Malvern. This can do the compressor check.

Cheers. What are your terms if I could visit ;-) ?

I think the MK2 uses the clutchless variable displacement compressor, if it's out of gas and oil it'll probably need to be replaced. The noise sounds like the injectors.

I read that the compressor has its own oil supply separate to the AC gas. Is that not the case?

The oil does work with the refrigerant

The oil does work with the refrigerant

Fascinating. Thanks.

 

I'm back on to thinking my compressor is fecked then.

 

So I should use the car as little as possible until the fault is sorted, as even in econ mode it'll still be turning the compressor internals, unless the 'seize clutch' has disconnected? 

I drove around with a knackered compressor for at least 5 months without issue.

Yeah it'll do no harm if the pulley has already disengaged, you could remove the drive belt and see if it turns free, if it does then drive it, if it doesn't then maybe it can be saved.

Am I right in thinking that the vacuum leak has nothing to do with the condition of the compressor?

Very unlikely.

It means there is a hole in the system somewhere.

Get the system pressure tested (free at ats) and check to see if the pressure valve is leaking, apparently it's quite common, or it was in my case.

It's been pressure checked, it failed. Just got to find out where the leak is which I'm assuming will require the leak tester dye and UV glasses.

As mentioned before only if it had dye in it before the leak. You can't knowingly fill a system with a leak with R134a. Nitrogen and bubble spray is the usual method these days.

Just to close this one off.

 

Managed to get the car booked in at Auto-Aircon Redditch (he's very busy) and the short story is that the compressor seized, snapped the clutch and contaminated the system.

 

He had to change the compressor, condenser, dryer, expansion valve, pressure sensor (had failed), flush the system, re-gas, and re-fill coolant.

 

£594 all in using a Denso compressor as he won't use the other 2 makes. He's never had a Denso fail on him.

 

All lovely and cold again in time for the winter.

Exactly what happened to mine. My a/c guy fitted a new Sanden 2013 spec compressor (in 2012) and flushed the system, happy that he'd cleared it of contaminants, recharged it and gave me a bill for £460.

I think you've got a very good deal there for all of that work to be carried out.