Volvo AWD 850 Forum
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SAVE 850 ac recharge 850
posted by 53charlie on Thu Jun 25 13:02 CST 2009
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last visit: Thu Nov 19 21:42 CST 2009[RELATED]No Klaus, the system was cooling some, so there was refrigerant in the system, and i did not want to have to evacuate it completely to do a vacuum test on it. It took one can on refrigerant to get to the right pressure, and the total capacity is 3 - 4 cans. I have only owned my 850 wagon for 6 months, and have only used the AC in the last month or so, therefore I have no way of knowing if that loss of refrigerant was sudden or if it happened over the life of the car. It has been almost four weeks now since I did this and the AC is cooling great, i am keeping my fingers crossed.
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posted by KlausC on Thu Jun 25 14:23 CST 2009
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last visit: Sat Nov 21 21:14 CST 2009[RELATED]The capacity is close to 26 ounces, or 2 cans. If you over fill it, the compressor will make a terrible noise and hopefully the overpressure valve will blow. Happened to me coming from 60F to 85F the next morning. BANG! but nothing hurt.
Klaus
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Common sense trumps a PhD
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posted by 53charlie on Wed Jun 24 13:45 CST 2009
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last visit: Thu Nov 19 21:42 CST 2009[RELATED]You do not say what is the reason you are recharging? if the system is leaking or was open, you need to fix the leak and make sure everything is tight by applying a vacuum. I am speaking like I knew what I am talking about but I just did my first AC job, reassembled the AC system in my 240 wagon, and luckily I had no leaks, pulled a vacuum for about an hour to remove moisture, then recharged it. it works beautifully. My '94 850 wagon was cooling marginally and the compressor was cycling on and off, which I found out happens when the system needs refrigerant. I hooked up my little connector/gauge I bought at AutoZone and it ended up eating a whole can of R134a before the pressure came to the right range. Now it is cooling great.
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posted by KlausC on Wed Jun 24 14:28 CST 2009
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last visit: Sat Nov 21 21:14 CST 2009[RELATED]Charlie, did you vacuum test the 850 before you added r134a? I bet not.
Klaus
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Common sense trumps a PhD
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posted by philly on Tue Jun 23 00:35 CST 2009
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last visit: Tue Jun 23 00:32 CST 2009[RELATED]Is your 850 a Turbo?
I don't have any suggestions....I'm just trying to figure out if the Turbo has a different port...nothing seems to be working
thanks and good luck
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posted by KlausC on Mon Jun 22 19:25 CST 2009
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last visit: Sat Nov 21 21:14 CST 2009[RELATED]Have you done this before? Was the can cold before you started?
The first time I did this, I screwed the hose end on to the can too hard. I backed off the can about 1/2 turn and I was in business.
Look in my profile and give me a call.
Klaus
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Common sense trumps a PhD
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posted by Ken Temkin on Mon Jun 22 18:25 CST 2009
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last visit: Fri Nov 20 20:27 CST 2009[RELATED]Did you short the low pressure switch? If not, you probably have to do that. Its the switch on the hard line on the passenger side, near the firewall. If you are standing directly in fron to the car, if you look at the first 'V' in Volvo on your valve cover, then look towards the firewall, that's your switch. You need to disconnect the connector and jumper across the contacts of the connector. When you are done charging, unjumper the connector and put it back on the switch.
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