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Author Subject: air con noise
darkgti6

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Location: Bracknell

Registered: 07 Jun 2008

Posts: 1,361

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Post #1
Had my aircon regassed earlier in the year after pulling the front end apart to replace the radiator. Didnt seem to be that cold after but didnt really mind because it was cold outside anyway. Recently its stopped producing any cold air. It still clicks on under the bonnet but im getting some weird hissing and gurgling sounds inside the dashboard passenger side. Anyone else had this problem or know how to fix it?

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m
Posted 11th Jul 2013 at 20:42
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Niall

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Location: Epsom

Registered: 06 Jun 2012

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Post #2
Sounds to be like its low pressure in the system. basically its leaking somewhere more than likely Sad
Posted 11th Jul 2013 at 23:09
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darkgti6

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Location: Bracknell

Registered: 07 Jun 2008

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Post #3
Niall wrote:
Sounds to be like its low pressure in the system. basically its leaking somewhere more than likely Sad


Or the guy didnt dose it properly to begin with. Didnt feel that cold after he dosed it. Also I got the impression his cannister was running low being winter. Might just get a regass done then and see what happens. I replaced all the o rings in the system when I disturbed them and the pipes are looking reasonable.

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m
Posted 11th Jul 2013 at 23:19
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Niall

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Location: Epsom

Registered: 06 Jun 2012

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Post #4
Who did it for you? Kwikfit pressure test them for all of about 2 minutes. Not enough to detect a leak. A good AC engineer will properly pressure test it to find leaks!
Posted 11th Jul 2013 at 23:24
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darkgti6

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Location: Bracknell

Registered: 07 Jun 2008

Posts: 1,361

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Post #5
Niall wrote:
Who did it for you? Kwikfit pressure test them for all of about 2 minutes. Not enough to detect a leak. A good AC engineer will properly pressure test it to find leaks!


It was a local guy whos mobile. Any recommendations on a reputable company to use for a test and regass?

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m
Posted 11th Jul 2013 at 23:39
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Niall

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Location: Epsom

Registered: 06 Jun 2012

Posts: 1,941

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Post #6
Assuming you are in Bracknell as it says below your username, this bloke may come to you and is very good and reasonable rates

http://www.cool-air4u.com/index.html
Posted 11th Jul 2013 at 23:52
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thugpuggin

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Location: Bristol

Registered: 10 Apr 2004

Posts: 26,784

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Post #7
Find person who won't regass till full system leak test is completed.

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Posted 12th Jul 2013 at 01:07
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darkgti6

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Location: Bracknell

Registered: 07 Jun 2008

Posts: 1,361

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Post #8
thugpuggin wrote:
Find person who won't regass till full system leak test is completed.


Ok. What is the criteria for a leak test? I work with hydraulics and do pressure testing up to 1800 bar sometimes so I know full well even a small leak is bad.

Ive heard that the system should be tested for leaks under vacuum as opposed to pressurization is this true? Also at work I proof test hydraulic systems for ten minutes and normally have a 2% tolerance for pressure drop. How long should this leak test be conducted for?

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m
Posted 12th Jul 2013 at 12:02
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darkgti6

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Location: Bracknell

Registered: 07 Jun 2008

Posts: 1,361

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Post #9
Niall wrote:
Assuming you are in Bracknell as it says below your username, this bloke may come to you and is very good and reasonable rates

http://www.cool-air4u.com/index.html


Yes I am near Bracknell. I'll give this guy a try thanks Niall.

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m
Posted 12th Jul 2013 at 12:04
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jimmyhackers

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Location: birmingham

Registered: 14 Jun 2011

Posts: 1,144

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Post #10
leak test it your self.

all you need is some half n half water n fairy liquid in a spray bottle

soak the system and look for the bubbles Smile

its usually where stuff gets screwed in (by human) that leak

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the world is changed by people in sheds
Posted 26th Jul 2013 at 00:40
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jimmyhackers

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Location: birmingham

Registered: 14 Jun 2011

Posts: 1,144

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Post #11
a vac test will show a leak far more quickly than a pressure test will. you will lose all your vacum from a system in a few seconds far easier than seeing a half a psi loss over half an hour.

however you wont usually be able to generate a vacum in a system with a large leak.
one of my many trades is air con (in shops n warehouses not cars) but leak finding is leak finding

once you know youve got a leak crack out the fairy. fairy liquid is the one for leak finding, and moving 6 tonne of fridge with nothing but butt bouncing power

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the world is changed by people in sheds
Posted 26th Jul 2013 at 01:16
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