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Old 09-04-2011   #1
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air con efficient?

Hi all, how can I check how efficient my air con is?

Am I expecting too much, how cold should it be and how can I test it myself?

It does get cold, but I dont think its not cold enough, but I have only had the car a year (56 plate MW 1.9 Diesel multijet 8v)

Any help would be appreciated.

Cliff
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Old 09-04-2011   #2
Whaddya mean too old?
 
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Re: air con efficient?

I'd check the temp of the aircon cold pipe at the bulkhead with cabin fan off. If it can get down to 4C then it's doing well.
You need to use the recycle switch to stop hot air coming in all the time otherwise your A/C is working overtime cooling new hot air rather than continually reducing the temp of the existing cabin air. After that you need a decent cabin fan airflow so check your cabin filter isn't blocked.
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Old 10-04-2011   #3
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Re: air con efficient?

I find the air con needs a top-up of refridgerant every two years to keep it at its best. And no, I don't have a leak...
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Old 10-04-2011   #4
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Re: air con efficient?

i heard from an air con specailist once that the coolant used in the air con gas has a some kind of oil in it which is supposed to coat the hole inside of the air con system preventing gas from escaping when its not been used? appartently if u use it every 3 months for 10 minutes it should last years ........... incidently, mine needs doing aswell because i have the same problem
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Old 10-04-2011   #5
Whaddya mean too old?
 
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Re: air con efficient?

It's very rare for air con systems to be completely gas tight. The flexing on engine movement, the large temperature changes from very hot to near freezing, and pressures from 15psi to 200 psi then it's a lot to expect. Oil is largely there to lub the compressor, lub the seals and prevent corrosion
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Old 10-04-2011   #6
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Re: air con efficient?

it makes sense really, its alot to ask that it stays all tight in there. I i had to re-gas both my marea and my ford ka and now it looks like i'll have to do my stilo too? i guess over time, its one of those jobs that need doing from time to time
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