SaturnFans.com
saturnfans.com - classifieds - forums


Go Back   SaturnFans.com Forums > Models > Saturn S-Series > S-Series Tech

Reply
 
Thread Tools Display Modes
Old 05-14-2022, 03:15 PM   #1
RICH1959
Junior Member
RICH1959 is on a distinguished road
 
Join Date: Aug 2017
Posts: 26
Default A/c question

I have a 96 sw2 I replaced the compressor and now the gauge readings are 150 on the high side and the low side is going into a vaccum someone said the condenser is bad ?
RICH1959 is offline   Reply With Quote
SaturnFans.com Sponsored Links
Old 05-14-2022, 09:55 PM   #2
fdryer
Super Member
fdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond reputefdryer has a reputation beyond repute
 
fdryer's Avatar
 
Join Date: Jan 2006
Location: NYC
Posts: 45,640
 

2003 L-Series 3.0L Sedan
Default Re: A/c question

There's a point when refrigerant loss results in different operating pressures. Briefly put, normal system pressures will show low side between 30-35 psi while high side varies between 125-250 psi in proportion to outside temperature and humidity. I'm guessing your pressure measurement was at idle rpm. The S-series require 2k rpm for measuring operating pressures because they vary greatly between idle and 5600 rpm (or whatever programmed rpm limits are). At idle rpm, low side should never show vacuum as this indicates one issue universal to every vehicle ac system - the leak no one wants to address.

Every ac system (room air unit, central hvac, freezer, refrigerator, truck trailer reefer) are sealed units. Every ac system is under pressure when not run. Vehicle ac system standby pressures will be around 75 psi in warm temperatures. A 12oz can of r134a has about 70 psi. With your system off, standby pressures are most likely low on both sides. When a system leaks with loss of refrigerant occurring, less refrigerant returns to the compressor resulting in a vacuum reading while the discharge side may have pressure. There are no published pressures for varying losses of refrigerant from a leak. The only other possible reason for your low pressure reading might be sealer use. Sealer is a temporary fix and not a repair as it contaminates a system and can seal or block off passages that can interfere with compressor operation. Sealer reacts to air or moisture, both evacuated from a new or repaired system before installing refrigerant. Refrigerant, oil and dye are the only things circulating in refrigeration systems. Anyone using sealer for a quick fix basically contaminates the system and it may not work resulting in a more expensive repair since a proper repair would require complete disassembly to thoroughly flush all oil and sealant from a system. The condenser may be damaged from sealer and cannot be completely flushed to rid it of sealer if it hasn't already reacted to seal passages. R134a condenser coils are flat tubes that can trap debris and allow sealer to seal if air or moisture entered from incorrect repairs.
fdryer is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Horn question...(Possibly a dumb question) ninetynineSC2 S-Series Mods 8 02-18-2013 10:01 PM
Fog Light Cover Question and Ignition Question macman90 L-Series General 1 06-23-2009 10:32 AM
Tranny Question and Splash Guard Question axslinger S-Series Tech 2 03-19-2007 06:25 PM
Newbie Question - Size of Air condenser compared to radiator? Also airbag question. 2002SaturnMan S-Series General 9 04-18-2006 09:53 AM
Question on replacing differential cover gasket ( non-Saturn question) Mark G Miscellaneous Tech 3 10-27-2002 01:50 AM


All times are GMT -4. The time now is 06:15 PM.

Advanced Forum Search | Advanced Photo Search


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
SaturnFans.com. The Saturn Enthusiasts Site.