Home > Technical > Air Conditioning Fault Finding |
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zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 |
first thing to do is take it to Kwikfit for a regas. If it doesn't work after the regas, they don't charge you. Before they regas it they do a leak check (or rather their machine does).
In most cases with AC it's not working because either the gas levels have dropped to low, there is a pressure switch that switches the compressor off when this happens. Or there is simply a fuse blown. The gas or rather the compressor oil contained in it needs replacing every couple of years anyway, so a regas won't do it any harm. |
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23rd Apr 2018 10:33am |
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hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2300 |
Thanks, will try kwik fit first!
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23rd Apr 2018 11:08am |
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Doc P Member Since: 03 Apr 2016 Location: Midlands Posts: 565 |
They do charge you - £50 for the ‘gas’ which they insist on putting in first to check - at least Derby Kwikfit at Pride Park did me. If it’s just low refrigerant, that’s it. If not, you’ll have to find the fault. You don’t get your £50 back (happened to my Volvo - it needed a new compressor). |
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23rd Apr 2018 4:56pm |
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Justtellme Member Since: 23 Nov 2015 Location: Ottawa Posts: 310 |
In Canada, they test by using nitrogen if they suspect a leak. That way refrigerant doesnt go in, then immediately leak into the atmosphere if there is a seal or large joint leaking.
Seems strange they would go straight to regassing with first determining there was no leak. Patrick |
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23rd Apr 2018 7:23pm |
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Doc P Member Since: 03 Apr 2016 Location: Midlands Posts: 565 |
Always wished I could have emigrated to Canada
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23rd Apr 2018 9:19pm |
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zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 |
It's has to be colder after they gas it than before, they put a temperature probe in the air vents. I had mine done, they said it didn't seem to be working properly so gave me my £50 back. So you DO get your £50 back, if you don't then you need to contact their head office, as that's their policy. Stupid thing was it seems to be working find. From their website;
Last edited by zsd-puma on 23rd Apr 2018 11:25pm. Edited 1 time in total |
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23rd Apr 2018 11:21pm |
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zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 |
The machine does a vacuum leak down check first I think, if it fails the machine won't let them gas it - it's automatic. If it passes the leak check, then they'll gas it but if the AC still doesn't work properly they give you your money back. |
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23rd Apr 2018 11:24pm |
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HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 737 |
Check the gas volume and check for leaks in the system. I once took a 2 week trip to the US and when I got back, the AC was not cold. Had gas volume checked then in with gas and the AC was cold, after about 2 months, no cold air again, checked gas volume and it was once again low to nil. Did a leak test and found out the culprit was the cooling coil behind the dash. Had that replaced with a slightly bigger one, better cooling.
Eventually had to replace the AC compressor some time after that as I had been regassing the system for a few months without adding oil into the compressor, it eventually seized. But this is a story for another time. I hope you get it sorted. |
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24th Apr 2018 4:11am |
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mick Member Since: 08 Feb 2010 Location: Yorkshire Posts: 2109 |
Mines packed in and it’s the heater matrix circa £600 for one.
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24th Apr 2018 6:49pm |
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shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834 |
Just had the condenser replaced on mine.
There's a lot to commend opening bulkhead flaps! |
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24th Apr 2018 8:04pm |
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Justtellme Member Since: 23 Nov 2015 Location: Ottawa Posts: 310 |
Aha! That makes much more sense......i have a vacuum pump and let it run for about 1/2 hour to draw a deep vacuum before i do the recharge. Many DIY modern refrigerant replacements for R12 available in North America are actually very flamable, so you need to be careful. Patrick |
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24th Apr 2018 8:32pm |
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hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2300 |
Update: Kwik Fit regassed the system today and all sorted was expecting something to need replacing but good outcome!
Found a 20% off code online too so only cost £48! For info the code is 20OFFAIRCONGSAVINGS0705 |
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11th May 2018 12:37pm |
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zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 |
Over the years it gradually seeps out through the seals, once it drops below a set pressure the system cuts out, to protect it's self. So it may not have been that low, just low enough to trip the pressure switch. If you don't use it for long periods, then the seals dry out and leak. So if you leave it switched off all winter that'll do it over time. If you're not aware in winter if you set the heater to hot and switch the AC on it does a brilliant job of demisting your windscreen almost instantly.
If it's not been done since it was built in 2007 it's done pretty well. |
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11th May 2018 2:10pm |
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hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2300 |
Definitely. I was well happy that it was just the gas! Was expecting a hellish job diagnosing what was leaking
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11th May 2018 3:44pm |
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