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#1
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A/C out, how can I tell if it was converted to R134?
A/C needs a recharge. How can I tell if the former meticulous owner converted it to R134? He is old and can't remember... Thanks.
Car is US Spec 1990 300D 2.5Turbo.
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Meek 1977 Volkswagen Golf GTi (sold) 1981 Audi 5000S Turbo (sold) 1982 Volkswagen Rabbit LS 145k (sold) 1983 Volkswagen Rabbit GTi 150k (sold) 1984 Saab 900 150k (sold) 1984 Volkswagen Scirocco GTX 1.8T 20V 1985 Mercedes Benz 190E 2.0 160k(sold) 1986 Mercedes Benz 190E 2.3-16 188k (sold) 1988 Volkswagen Fox 161K (sold) 1990 BMW 525td (Sold) 1990 Mercedes Benz 300D 100k 1994 Saab 900 SE Turbo 55k (sold) 1996 Volvo 855R 140K 2001 VW Jetta Wolfsburg 16k (sold) |
#2
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Look at the valves.
If they have the quick-connect fittings it was most likely converted.
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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine) Raleigh NC - Home of deep fried sushi! |
#3
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Meek:
134a quick connect valves will only work with 134a hoses, etc. Cary |
#4
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The only way is with a refrigerant identifier. Most shops that do A/C work should have one (in CA it's mandated). To just identify shouldn't run more than 1/2 hour of labor.
The valve thing is a good quick glance type check, but can be misleading as folks can put R-134a in without changing the valves. R-134a is used in many applications, only automotive has the different fittings. A/C techs from other industries have gauge sets that will connect to standard fittings, without the unique automotive quick connects. If it's empty you can vacuum and charge with the refrigerant of your choice, if it's not empty you really need to know what's in it, as no one would want to recover what it does have and risk contaminating their equipment with unknown or mixed refrigerants. MV |
#5
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How well did it work before? If it got nice and cold, it was probably R12.
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2012 E350 2006 Callaway SC560 |
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