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where do you find high/low pressures these days?

2000_civic on Wed August 20, 2014 2:51 AM User is offline

Model: mariner

Hello all. I changed the service port valves on my moms mariner. It held a vacuum and charged fine. My question is where can I find the correct high/low side pressure specification? All I could dig up was the amount of refrigerent the vehicle takes. It came out to just under 3 of the small cans. Its cooling fine, but the compressor doesn't seem to be cycling off. Could this be because the system is set to max cool? And where can I find the high/low pressures to know if im good? Its either an 04 or an 05, I forget at the moment. Thanks for reading, and any advice you might have.

TRB on Wed August 20, 2014 1:09 PM User is offlineView users profile

Vehicles should be charged by weight not pressures.

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2000_civic on Wed August 20, 2014 2:44 PM User is offline

I can understand that. But aren't the pressures valuable as a diagnostic? One of my first auto a/c books had pressure listings for all kinds of vehicles. How do I know if my high side is operating within the manufacturers specification? Are you telling me that the information is not available?

2000_civic on Wed August 20, 2014 7:01 PM User is offline

I mean, I saw the sticky for the link to alldata. Is that the only place you can find out what your pressures are supposed to be? Do we not pay attention to pressures anymore? My civic was a refrigerator after the help I got here a couple years back. Anyone on this forum use gauges?

TRB on Wed August 20, 2014 7:14 PM User is offlineView users profile

You still have the general pressure readings but Alldata and Mitchell hardly post pressure readings for newer vehicles. Goal is to charge by weight and then see where your pressures are. If you have 400PSI you have an issue, not a refrigerant capacity issue.

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Contact: ACKits.com


Edited: Wed August 20, 2014 at 7:15 PM by TRB

2000_civic on Wed August 20, 2014 7:33 PM User is offline

Thank you for the reply. Im nowhere near 400. Im right around 200 with a about 1/3 left in the 3rd 12oz can. My machine is in another county right now. So no scale. I get charging by weight, I do. But I'm also not happy that pressures are going out of style at all. When you say "charge by weight and see what the pressures are", ..... see what the pressures are relative to what?? Some sort of specification? I agree!! That would be great!! Then we could adjust the gauge readings for ambient temperature/altitude and really get a good idea of where we stand!!

2000_civic on Wed August 20, 2014 7:41 PM User is offline

So can anyone help me figure out what the pressures should be?

2000_civic on Wed August 20, 2014 7:59 PM User is offline

Its a 2005 mercury mariner. First person to tell me what ford says my gauges should read gets a 12 pack sent to their door. I'm not kidding.

TRB on Wed August 20, 2014 9:08 PM User is offlineView users profile

A/C Compressor FS-10
Displacement 170 cc (10.4 cubic inches)
Cylinder bore 29.0 mm (1.14 in)
Cylinder stroke 25.7 mm (1.0 in)
Rotation Clockwise
Magnetic clutch
Air gap between pulley and hub mm (inches) 0.35-0.75 mm (0.014-0.029 in)
A/C cycling switch - 2.3L, 3.0L (4V)
Close 200-317 kPa (29-46 psi)
Open 138-165 kPa (20-24 psi)
High Pressure Cut-Off Switch
Fan ON (closed contacts) 2,241 kPa (325 psi)
Fan OFF (open contacts) 1,896 kPa (275 psi)
A/C clutch cut-out (open contacts) 3,103 kPa (450 psi)
A/C clutch cut-in (closed contacts) 1,724 kPa (250 psi)
Evaporator core orifice tube size/color
Color Orange
Diameter 1.44 mm (0.057 in)
A/C pressure relief valve
Open 3,792 kPa (550 psi) minimum
Lubricant
PAG Refrigerant Compressor Oil (R-134a Systems) YN-12-D WSH-M1C231-B
Capacity - 2.3L, 3.0L (4V) 207 ml (7 oz)
Refrigerant
R-134a Refrigerant YN-19 (US); CYN-16-P or CYN-16-R (Canada) WSH-M17B19-A
Capacity - 2.3L, 3.0L (4V) 907 g (2 lb)
Cleaner
A/C System Flushing Solvent YN-23

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

2000_civic on Thu August 21, 2014 2:03 AM User is offline

[email protected] just let me know what kind of beer you like!! That info helps me a ton!!

TRB on Thu August 21, 2014 9:35 AM User is offlineView users profile

I don't drink. A positive post on Yelp about Arizona Mobile Air will work.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

blueskies on Wed September 03, 2014 11:07 PM User is offline

Hello, Mr TRB...is it possible to give me the info you posted for this gentleman and his vehicle....for mine as well? I don't know how to access where you got this info from, but I sure would appreciate knowing it....thank you in advance, my vehicle is a 1995 GMC Suburban, K2500, 454 engine (7.4L), front/rear a/c running r134 in it. Don't know what else you'd need...? Again, thank you and sorry for the topic change....

TRB on Wed October 22, 2014 6:37 PM User is offlineView users profile

If you plan to work on your own vehicle. I suggest purchasing the single vehicle subscription from Mitchell or Alldata. It's cheap and has all the info you could think you would need.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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