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#1
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95 606 A/C evaluation
A/C worked fine for 7 years. This weekend, a/c stopped cooling. (New klima relay and new CCW recently). Shop guy said that he pulled a pound of 134 out, the system held vacuum for over an hour, then he put a more back in and it's cooling fine. He said the 134 he uses has a dye in it, so he can detect any leaks if they develop or are present.
I only have a basic understanding of this system. He's not the kind of shop guy who wants to spend time explaining things to customers, so I didn't push it. Can someone please explain what he did? How does a system lose 134 unless there's a leak somewhere?
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2009 E320 Bluetec 117,000 1995 E300D 306,000 Sold 1996 Ford Taurus LX 130,000 Sold 1985 300TD Still 225,000 Sold 2016 Ford Fusion 24,900 Last edited by connerm; 05-23-2011 at 04:25 PM. |
#2
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To me it sounds like there was a small leak that let some of the 134a out, so now that your car has leak detector dye in it the leak will be easier to spot.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#3
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What's a CCW?
There's a low refrigerant pressure switch that disables the compressor below a setpoint. The system could have been leaking slowly from day 1 and only last weekend went below the setpoint. If it held vacuum for an hour, there's a good chance it'll be good for years and years. It's possible that it leaks under pressure but not under vacuum. No need to worry about it until the AC quits again. Sixto 87 300D |
#4
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Quote:
I am going to assume you purchased the car 7 years ago? I replaced the compressor and dryer on the 280k mile 95 E300 a few months ago. I don't remember if I did it as a preventive measure or if the compressor finally died. I don't think the wife ever selects economy.
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Jim |
#5
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ccw
Sixto asked: What's a CCW?
I meant to say CCU (Climate Control Unit). CCW is Concealed Carry Weapon permit. Oops. Sorry. Wrong forum.
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2009 E320 Bluetec 117,000 1995 E300D 306,000 Sold 1996 Ford Taurus LX 130,000 Sold 1985 300TD Still 225,000 Sold 2016 Ford Fusion 24,900 |
#6
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CCW is also a direction of rotatation...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
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