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Author Topic: Aircon question ..??  (Read 1557 times)

Colinspence

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Aircon question ..??
« on: May 08, 2018, 11:03:58 am »
Iv had my aircon re gassed , and checked for leaks etc ..

But it’s still not “ice cold”

Is there anything that might need changing like the rad ??

Thanks. Colin

Offline lukemk5gti

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Re: Aircon question ..??
« Reply #1 on: May 08, 2018, 12:10:04 pm »
Pressure sensor is a likely culprit

This thinghttps://www.ebay.co.uk/itm/A-C-AIR-CONDITIONING-COMPRESSOR-PRESSURE-SWITCH-SENSOR-VW-GOLF-IV-V-VI-MK4-MK5-6-/291281749012

You need a crows foot spanner to replace it

Offline GitFlog

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Re: Aircon question ..??
« Reply #2 on: May 08, 2018, 12:14:17 pm »
Have you waited for the car to get up to temperature?

i know the air conditioning compressor on the mk5s has a habit of going.

When i got my mk5 gti the air con was cold as hell then it went soon after i thought this could be the case with mine but luckily i did just need a re gas but i did look into what else it could be as it happened late at night and alot of people were saying air conditioning compressor could be a problem.
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Colinspence

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Re: Aircon question ..??
« Reply #3 on: May 08, 2018, 03:39:58 pm »
Iv done hour ride home and it’s still not that cold. I’ll have a look at the above

It’s it an easy job to do ??

Colinspence

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Re: Aircon question ..??
« Reply #4 on: May 08, 2018, 03:48:23 pm »
Will the air con need re gassing after fitting that ?

Offline GitFlog

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Re: Aircon question ..??
« Reply #5 on: May 08, 2018, 05:28:48 pm »
yes unfortunately it will.
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Offline lukemk5gti

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Re: Aircon question ..??
« Reply #6 on: May 09, 2018, 11:10:06 am »
Will the air con need re gassing after fitting that ?

No it won't

The pressure sensor sits on a non return valve or similar so when removed the gas does not escape

Offline GitFlog

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Re: Aircon question ..??
« Reply #7 on: May 09, 2018, 12:56:26 pm »
sorry i ment the full unit not just the sensor like in  my previous post
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Offline pudding

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Re: Aircon question ..??
« Reply #8 on: May 10, 2018, 02:20:30 pm »
The high and low side pressure sensors will throw a code in VCDS if faulty.

Other causes of less than satisfactory chilling are:

Air con pump - you will know if that's dead.  It won't 'clunk' into action when you put the AC onto Auto and LO.

Blocked or leaking condenser -  Blocked fins is very, very common on these cars, being the front most radiator in the sandwich of 3.

Receiver drier canister thing to the left of the radiator - Dunno what that does but apparently another potential cause.

Gas leaks - usually from a cracked condenser.  Fluorescent dye is the easiest way to find leaks, or a sniffer probe.

Radiator fans - these should be seen spinning when the AC is on at idle.

And lastly, the AC on the MK5 really isn't all that anyway.  Mine is fully operational and I have to drive for at least 30 mins with the windows closed before I get what I consider to be cold air out of it.  It's never been 'icy' cold like a lot of other cars kick out.


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D