air con
darren

Preston, UK

#1 Oct 16, 2011
hi all that can help me on my air condishoning unit do you now wot the a mowt gas that shud be it the sisterm and were the gas valve is thanks darren
Jan Forrest

Rotherham, UK

#2 Oct 17, 2011
Can I assume that your air con isn't pumping out cold air? Depending on the actual model you could cause damage by switching it on if it isn't full of refrigerant! This includes using the front screen demister (even with the heating set to hot) as the A/C is used at the same time to reduce the humidity of the incoming air to clear the screen faster.

Working on the A/C isn't really a DIY proposition for several reasons, but the most important is the environmmental laws that require any old refrigerant to be recycled or disposed of correctly. Next is the need to know exactly why the system is low. It could have slowly leaked away over several years by osmosis through the various pipes and joints, but it could equally be a real leak/hole somewhere that needs to be found and repaired.

Fortunately there is help at hand in the UK. Just pop along to your nearest 'KwikFit' outlet and let them do the whole job. For a fixed fee they will vacuum all the old refrigerant, flush with nitrogen, pressure and leak test it and finally refill with the correct quantity and type of refrigerant along with the necessary lubricant and UV flourescent dye. Note that the refrigerant comes in 3 types these days: The old R12a which is now illegal to use anywhere in the EU, the 'new' R134a which is incompatible with many of the seals and so requires some expensive work to be carried out first, and lastly the rare R24a which is legal AND compatible with R12a. Few A/C repairers bother with this as they don't get to use it very often.

On my Shadow 1 the 'gas valve' is attached to the front offside inner wing and lurking under the hydraulic fluid reservoir.
Brighton Autoair

Newcastle Upon Tyne, UK

#3 Feb 18, 2012
Jan Forrest wrote:
Can I assume that your air con isn't pumping out cold air? Depending on the actual model you could cause damage by switching it on if it isn't full of refrigerant! This includes using the front screen demister (even with the heating set to hot) as the A/C is used at the same time to reduce the humidity of the incoming air to clear the screen faster.
Working on the A/C isn't really a DIY proposition for several reasons, but the most important is the environmmental laws that require any old refrigerant to be recycled or disposed of correctly. Next is the need to know exactly why the system is low. It could have slowly leaked away over several years by osmosis through the various pipes and joints, but it could equally be a real leak/hole somewhere that needs to be found and repaired.
Fortunately there is help at hand in the UK. Just pop along to your nearest 'KwikFit' outlet and let them do the whole job. For a fixed fee they will vacuum all the old refrigerant, flush with nitrogen, pressure and leak test it and finally refill with the correct quantity and type of refrigerant along with the necessary lubricant and UV flourescent dye. Note that the refrigerant comes in 3 types these days: The old R12a which is now illegal to use anywhere in the EU, the 'new' R134a which is incompatible with many of the seals and so requires some expensive work to be carried out first, and lastly the rare R24a which is legal AND compatible with R12a. Few A/C repairers bother with this as they don't get to use it very often.
On my Shadow 1 the 'gas valve' is attached to the front offside inner wing and lurking under the hydraulic fluid reservoir.
May I just correct the fact that Nitrogen is used for pressure testing and not flushing. Also the system cannot be damaged if the gas is low as the low pressure switch will not allow the compressor to come on if gas is low.
Jan Forrest

Bradford, UK

#4 Feb 21, 2012
Brighton Autoair wrote:
<quoted text>
May I just correct the fact that Nitrogen is used for pressure testing and not flushing. Also the system cannot be damaged if the gas is low as the low pressure switch will not allow the compressor to come on if gas is low.
Unfortunately there isn't an automatic low pressure switch on early Shadow or Cloud air con systems, so allowing it to run can still cause damage to the compressor. This oversight may have been fixed on the Shadow II, but I couldn't say for certain.

Since: Feb 12

Singapore, Singapore

#5 Nov 23, 2012
Recently my aircon start to blow out hot air instead of cool air.
Anybody have the same problem as me before?

Got to do a chemical servicing for my aircon unit tomorrow from http://www.facebook.com/airconservice

Hope they can solve the problem for me.
Jan Forrest

Rotherham, UK

#6 Nov 24, 2012
Any time the refrigerant gets too low the air con will stop working. As I said previously some earlier cars don't have a safety switch to prevent the compressor running when there's insufficient refrigerant so you should ensure that it's switched off at all times until it's been fully checked out. That company seem to know what they're talking about, but not being local I couldn't say for certain.

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