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Charge A/C Just looking for the low pressure side of A/C to charge system.

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  • fostej1 Apr 23, 2009

    Oh, sorry -auto. 97 expedition

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What kind of A/C ? Home, Automotive

Posted on Apr 23, 2009


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3 Answers

My car didn't take the R-134a


If your car ac is not taking in refrigerant, it could be caused by several things.
If you have recently done work on the system and you are going to fill the system the first time, you will need to pull a very deep vacuum before trying to charge in refrigerant. If you have already properly evacuated the system and having problems getting the correct charge adjusted, you may be having problem with pressure equilizing between the refrigerant source and your ac system. To get the refrigerant going again, you need to connect the charging hose on the low pressure side of the ac system and turn the fan and ac on cool. The pressure in the ac system on the low pressure side will get lower than the pressure in the refrigerant container and flow will start. When charging initially, charge liquid on the high pressure side and with the ac system running, charge gas on the low pressure side. To charge liquid, invert most container so spout is down, to charge gas, keep container right side up. Charging by gas help you to not over charge your system. Beware on most vehicle ac systems the suction and discharge connections are two different sizes and require the proper adapter. If you still having problems creating a pressure difference to move refrigerant, you can try immersing the refrigerant container in warm water or applying warm air to the exterior of the container.
Hope this helps.

Jan 02, 2015 | Cars & Trucks

2 Answers

Oldsmobile problems


Danger! Always connect the charge fitting to the low side of the system and use the proper refrigerant. All low side fittings have been the same since around 1993. It looks like you are trying to apply the charge to the high side of the system. THIS CAN CAUSE THE CAN TO EXPLODE. Find the low side charge fitting. The low side will have a wider hose or tubing. A 134A charge kit will have the proper fitting to fit your car. The fitting might be hidden but when you find it the charge connector will fit on it.I recommend you use a charge kit with a pressure gauge. On a hot day it should read about 30-40 psi

Aug 06, 2014 | 2002 Oldsmobile Alero

1 Answer

R-22 home condenser unit low side and high side pressures when running


Pressures look good but to know if it is charged correctly you have to do a sub cool or superheat to know for sure. Rule of thumb is if turn unit it on let it run 10 minutes. If the suction line sweats and is cold. Might be proper charge.

Jun 24, 2014 | Ruud Central System Air Conditioner

3 Answers

WHERE DO YOU PUT FREON IN A 1999 DODGE RAM VAN


Along the condensor lines, you will find 2 ports that should have screwed on black caps, you will then remove the cap. Dependant on the year, you may need to upgrade the system R-12, vs R-134a; and recharge kits are available at various locations depending where you live. Also, the AC system is charged based on pounds, so be extra careful when attempting a new charge. Some vehicles only require 2 lbs.

Aug 26, 2011 | Chrysler 300 Cars & Trucks

1 Answer

Is the low pressure side of 92 F-150 on the condenser or near the compressor.


LOW PRESSURE SIDE IS THE SUCTION CHARGE SIDE WILL BE FROM AC COMPRESSOR REFRIGERANT LINE TO THE ACCUMULATOR OR DRIER TO THE EVAPORATOR IN THE FIRE WALL THE AC COMPRESSOR LINE TO THE CONDENSOR IS THE HIGH PRESSURE SIDE YOUR DISCHARGE SIDE. DONT DONT TRY CHARGING AC SYSTEM AT THE HIGH PRESSURE SIDE. CHARGE AT THE LOW PRESSURE SIDE.

Aug 18, 2011 | Ford F-150 Cars & Trucks

1 Answer

1995 Volvo 850 Turbo I neeed to recharge air conditioner however on line instruction show you must re-charge from hi pressure side and about half say recharge fro low pressure side which is correct.


You never ever charge any refrigerant system in the
world from the high side

Always the low side,as you want to add it in a gas form

If you invert the can & charge hi side ,liquid ref will

ruin the compressor, as it can't compress a liquid

Jun 29, 2011 | 1995 Volvo 850

1 Answer

Need air cindition recharge, don't have cash to take it someplace, can you help with instructions to do this


YOU NEED A R-134 GAUGE SET TO CHECK LOW PRESSURE SIDE AND HIGH PRESSURE SIDE.YOU ALSO CAN BUY A LITTLE CHEAPER GAUGE TO CHECK YOUR AC LOW BLUE SIDE AND HIGH RED SIDE AT ANY AUTO ZONE OR ADVANCE AUTO PARTS.WHAT YOU DO WHEN YOU GET YOUR GAUGE SET HOOK GAUGE TO LOW PRESSURE SIDE BLUE CAP PORT AND GAUGE TO HIGH SIDE PRESSURE RED CAP PORT.YOU CRANK CAR UP GET IT OPERATING TEMPERATURE.THEN TURN AC ON HIGH COOL LET RUN 3 TO 4 MINUTES.CHECK LOW SIDE GAUGE READING SHOULD BE 28 - 32 PSI. HIGH PRESSURE SIDE GAUGE SHOULD 199 - 228 PSI. THATS NORMAL CHARGE. SEE YOU CANT JUST RECHARGE AC SYSTEM UNTIL YOU CHECK IT FIRST YOU WILL DAMAGE SYSTEM .NOW YOU CAN GO TO AUTO ZONE PARTS BUY A CHARGE CAN WITH GAUGE AND HOSE.ATTACH TO IT.YOU NEED MORE THAN ONE CAN.WARNING MAKE COMPRESSOR IS RUNNING WHEN YOU TURN ON AC .BECAUSE IF COMPRESSOR NOT RUNNING CHECK FUSE AND AC COMPRESSOR RELAY.IF BOTH OKAY.YOU COULD HAVE OPEN CLUTCH COIL A FAULTY LOW PRESSURE SWITCH WILL CAUSE AC NOT TO WORK. IF LOW PRESSURE GAUGE BLUE SIDE PRESSURE IS 28 OR 30 YOU DONT NEED A CHARGE.PROBLEM SOME WHERE ELSE.BE SURE TO WEAR SAFETY GLASSES WHEN WORKING ON AC SYSTEM.

Jun 26, 2010 | 2004 Hyundai Elantra

2 Answers

Where is low pressure port located on 1999 acura


look for the large ac line/hose and follow it untill u come to the small service port this is wher u charge the small ac line/hose has the large port this is the high side

Jun 29, 2009 | 1999 Acura 3.5RL

2 Answers

I need to know how to jump the ac low pressure to get my ac compressor to come on.


If you look on the low pressure side of the AC system you will see a plug that is incorporated in to the line. It will have two wires leading to it. Remove the plastic clip that attaches the two wires to the sensor and use a short piece of wire to connect the two terminals in side the plug by putting the ends into the cap. This will bypass the low pressure sensor and allow the AC clutch to engage and begin to cycle again. Remember this low pressure switch is there for a reason. If you don't add more r-134 to the system and allow the AC compressor to cycle you will destroy the compressor. You need to charge the system when you bypass the low pressure switch and get the system up to full charge status and reconnect the switch.

May 24, 2009 | 1995 Chevrolet Camaro

2 Answers

How to recharge a.c. unit 99 kia sephia


Yes you can recharge it yourself. You have to charge on the low pressure side. Your filler hose will only fit the low pressure side. Follow your hoses until you see a cap (usually blue on the low pressure side) and that will be your charge point.

I hope this helps you, and I wish you luck on your repair.

May 20, 2009 | 1999 Kia Sephia

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