Aircon Low Pressure Port

Colin Preece · 05-09-2007, 03:37 PM

Can anyone tell me which is the low pressure port on a 2002 A4 1.9tdi so I can top up the system without blowing myself into little bits !!!

a8 tech · 05-09-2007, 04:16 PM

Hello Colin,the smaller diameter port of the two is the low pressure.What are you using to fill the system.Regards Jon

Colin Preece · 05-09-2007, 05:17 PM

Hi Jon thanks for that. My air con has gone through a quirky patch. The econ light would not go off and then after a few weeks the system came back on line but the cooling effect is not as strong as it was. I thought a can of rejuvinator from Halfords might do the trick !???

a8 tech · 05-10-2007, 02:29 PM

Hello Colin,how much is this thing you call rejuvinator and does it allow you to fill to a set capacity.Your capacity when drain/refill is 500 grams.I never heard of these self fillers and i am keen to find out if there any good.Regards Jon

Colin Preece · 05-10-2007, 03:49 PM

Hi Jon, whole can is only 113g with no pressure guage so a shot in the dark. Kwik Fit do system recharges for £44.00, seems good value. I now have another problem as the econ light has started to go on and off at will. Any ideas? Could be a low pressure switch plus system recharge, can't use the Halfords can if the compressor isn't working. It never rains !!!

a8 tech · 05-11-2007, 01:45 PM

Hello Collin,yes pressure switch could be stuck or incorrect pressure.You may need to connect a fault code reader and check aircon address is 08.I dont think you have a fault code reader but you are making me laugh with your antics and i am finding these self filler things very entertaining.Keep going Colin,Very best regards Jon

Colin Preece · 05-11-2007, 04:24 PM

Hi Jon, absolutely right no code reader, my local non Audi garage takes care of all mechanical problems of which there have been none. Unfortunately they are not aircon specialists so I find myself on a lone quest to try to save some money and get the system fixed. I think I'll try a recharge (not with the Halfords can) to see if extra system pressure will work. I can then try to get the source of the leak (if there is one) found and go from there. All the best Colin

Colin Preece · 06-03-2007, 10:44 AM

Hi Jon, just an update to air con pronblem. I used the refill can and things have certainly improved. I therefore think that a proper system recharge is neccessary and will arrange this at a local independant for the near futire. Regards Colin

a8 tech · 06-03-2007, 12:55 PM

Hello Colin,sounds good especially as it has been so hot today.Regards Jon

05-09-2007, 03:37 PM	#1 (permalink)
Colin Preece Newbie Join Date: Jul 2006 Location: Abercynon, South Wales Posts: 5 Gallery: (0)	Aircon Low Pressure Port Can anyone tell me which is the low pressure port on a 2002 A4 1.9tdi so I can top up the system without blowing myself into little bits !!!

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05-09-2007, 04:16 PM	#2 (permalink)
a8 tech Expert Join Date: Apr 2007 Location: not telling you Posts: 595 Gallery: (0)	Hello Colin,the smaller diameter port of the two is the low pressure.What are you using to fill the system.Regards Jon

05-09-2007, 05:17 PM	#3 (permalink)
Colin Preece Newbie Join Date: Jul 2006 Location: Abercynon, South Wales Posts: 5 Gallery: (0)	Hi Jon thanks for that. My air con has gone through a quirky patch. The econ light would not go off and then after a few weeks the system came back on line but the cooling effect is not as strong as it was. I thought a can of rejuvinator from Halfords might do the trick !???

05-10-2007, 02:29 PM	#4 (permalink)
a8 tech Expert Join Date: Apr 2007 Location: not telling you Posts: 595 Gallery: (0)	Hello Colin,how much is this thing you call rejuvinator and does it allow you to fill to a set capacity.Your capacity when drain/refill is 500 grams.I never heard of these self fillers and i am keen to find out if there any good.Regards Jon

05-10-2007, 03:49 PM	#5 (permalink)
Colin Preece Newbie Join Date: Jul 2006 Location: Abercynon, South Wales Posts: 5 Gallery: (0)	Hi Jon, whole can is only 113g with no pressure guage so a shot in the dark. Kwik Fit do system recharges for £44.00, seems good value. I now have another problem as the econ light has started to go on and off at will. Any ideas? Could be a low pressure switch plus system recharge, can't use the Halfords can if the compressor isn't working. It never rains !!!

05-11-2007, 01:45 PM	#6 (permalink)
a8 tech Expert Join Date: Apr 2007 Location: not telling you Posts: 595 Gallery: (0)	Hello Collin,yes pressure switch could be stuck or incorrect pressure.You may need to connect a fault code reader and check aircon address is 08.I dont think you have a fault code reader but you are making me laugh with your antics and i am finding these self filler things very entertaining.Keep going Colin,Very best regards Jon

05-11-2007, 04:24 PM	#7 (permalink)
Colin Preece Newbie Join Date: Jul 2006 Location: Abercynon, South Wales Posts: 5 Gallery: (0)	Hi Jon, absolutely right no code reader, my local non Audi garage takes care of all mechanical problems of which there have been none. Unfortunately they are not aircon specialists so I find myself on a lone quest to try to save some money and get the system fixed. I think I'll try a recharge (not with the Halfords can) to see if extra system pressure will work. I can then try to get the source of the leak (if there is one) found and go from there. All the best Colin

06-03-2007, 10:44 AM	#8 (permalink)
Colin Preece Newbie Join Date: Jul 2006 Location: Abercynon, South Wales Posts: 5 Gallery: (0)	Hi Jon, just an update to air con pronblem. I used the refill can and things have certainly improved. I therefore think that a proper system recharge is neccessary and will arrange this at a local independant for the near futire. Regards Colin

06-03-2007, 12:55 PM	#9 (permalink)
a8 tech Expert Join Date: Apr 2007 Location: not telling you Posts: 595 Gallery: (0)	Hello Colin,sounds good especially as it has been so hot today.Regards Jon

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