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Where is the valve to charge the freon - 1996 Cadillac DeVille

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Passenger side grey canister...........

Posted on Jun 27, 2009

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How to get freon into my minivan with a good compressor and a clutch that works real quiet clutch that spins good


First you need to locate the low side of the charging system. This is usually determined by the connector you can get now days with the Freon. Not sure what year you are working with but the Schrader valve on the line will normally be two different sizes so you can not hook up to the high side. You can press down on the Schrader valve and if there is pressure in the system it will release a small amount of Freon, if you are trying to determine if it is allowing the Freon to enter the system. The Schrader valves screw in just like a bike stem valve does, if it needs to be changed. .

Sep 23, 2015 | AC Cars & Trucks

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AFTER REPLACED THE HEATER CORE AND THE VALVE TEMPERATURE CONTROL NOW I CAN'T CHARGE FREON ,HOSE FREEZE AND IS NOT CHARGING


The water system and the Freon system are two different things. You would just use antifreeze in the heater core and control valves for this system.

The Freon system should have remained sealed unless it was disconnected to move it out of the way. It is usually recommended to replace the dryer (black oblong tank) whenever you open the Freon system. If the Freon system was opened, you need to borrow a Vacuum Evacuator pump from an Autoparts store and run it to pull out all the air inside the lines and create a Vacuum for the Freon to be added.

There are special pliers and "O" rings for the joint unions.

Next, for the Freon system, you would need to jump the low pressure connector switch to activate the compressor clutch to draw in the Freon. It is going to take several cans of Freon to recharge an empty system. Not all cans are the same size, and I recommend 1 can having at least some oil charge be added to the fill. Like car sizes, each car has different amounts of room for the A/C equipment lines. The Manufactuer should have a label stuck around the fan shroud to show how many ounces the system will take. More is not better. You will get into partial can situations, but Freon can stay in the dispenser can if you have good equipment to leave attached.

You use pressure gauges which can also be borrowed from Autozone, for instance, and used to measure the amount of Freon you have installed. Once you have put in 1 can of Freon, you may be able to reconnect and remove the jumper wire from the low pressure harness. The A/C compressor clutch should continue to cycle and draw in Freon when it does cycle.

Overcharging the system will break hoses and may damage seals. There is a high pressure cut-off switch. So you want to charge the system to have pressure between the low and high pressure cut-offs to work at optimum efficiency.

I hope my solution helps you.

Mar 16, 2012 | 2005 Lincoln LS

1 Answer

On my BMW 325XI Wagon, the ac is not cooling, the drier, expansion valve, compressor & ac control module have been replaced. Starts to cool as low as 65 degrees & then compressor shuts off.


sounds like unproper ac evacuation before charging the freon to your ac system. do a proper evacuetion to the system check the ac compressor oil charge the proper freon & amount check the vehicle tag for the amount of freon under the wood close to the radiator

Aug 08, 2011 | 2001 BMW 325

1 Answer

Can the a/c on 2002 Ford Explorer be re-charged with Freon or is it actually a sealed system?


All systems can be charged, there are valves to charge the system up, theres a highside and a lowside valve, the highside is the larger valve and the lowside is the small valve. the system is charged through the low side valve. good day.

May 15, 2011 | 2002 Ford Explorer Sport Trac

2 Answers

When i turn on ac it blows hot air


Normally due to low freon. Also, notice if the a/c compressor clutch engages, as it will not if the freon is low.

Jun 05, 2010 | 1999 Chevrolet Silverado 1500

2 Answers

How do I add freon to a 2002 Ford Taurus? The


YOU NEED THE R 134 CHARGE HOSE KIT.YOUR CAR DONT HAVE R - 12 FREON.THEY STOP USING FREON BACK MID 90S ALL CAR NOW HAS R-134 REFRIGERANT.

May 31, 2010 | 2002 Ford Explorer

1 Answer

How can i recharge the air conditioner? Where is the hose located?


Ok if you want to do a home repair in hopes of saving yourself a lot of money and with hopes your system is not in major trouble, here goes:
First step buy 3 types of 1 lb. cans of refrigerant R134a at a parts store, 1 can of leak detector freon combination, and if possible 1 can freon/air conditioning oil combination freon along with 1 can of straight r134a freon.
The store will sell you a charge hose with a cheap type of charge gauge attachment and fittings to attach to your system for the re-charge.
Providing your system is low on freon,First, with the vehicle running and the a/c on full cold, high fan, install the 1 lb. can of freon/oil combo first only charging through the low pressure side of the system never through the thin line high pressure side as the pressure from the high side can enter the cgharging freon can and explode it like a bomb,(this low side line is the larger hose and the low side charging hose fitting the parts store sells you will only screw onto the low side charge valve which is normally marked "low" on the top of the plastic dust cap that is factory installed(hand screwed) on the low side valve fitting.
Secondly after the oil/combo can is emptied into the low side and you of course are wearing mechanics hand protection gloves and eye protection googles, then and only then will you install the leak dector 1 lb. freon can combo.
Third you will install the last 1 lb can of r134a freon, however your vehicle will not allow the whole last pound of freon into its system by means of a pressure relief blow valve that will automatically blow off any excess pressure once the system over fills, the system typically holds approximately 2.75 lbs. of freon.
If you have successfully installed the above freon into the system it should be up and running providing the system is in fairly good working order, by that I mean it may have a very slow leak that allowed the freon tio originally escape in the first place causing you to refill it, and if it does have a leak the leak detector die that you installed into the system should leak out from wherever it may be escaping from, indicating the place of needed repair by means of a red or blue, or whatever other designated coloration the die gives out from the leaking area.
Please note: Not all home charging techniques typically work as there are many mechanical failure factors in an a/c system that may require a certified a/c technician to determine exactly why your system is not working should the home remedy fail.
I hope this helps you and remember to always work safe with eye and hand protection especially around freon gases which become extremely cold and can cause frost bite when contacting with the bare skin.

May 08, 2010 | 2001 Cadillac DeVille

1 Answer

My 2008 F250 w/ auto air conditing will only blow hot air after the truck is out in the sun for a short time when it is cool in the morning it works fine..


YOU NEED TO ADD MORE FREON TO THE UNIT. SOUNDS LIKE IT NEEDS TOPPING OFF. YOU CAN BUY R-134A FREON IN A PACKAGE WITH A HOSE AT A PARTS STORE. DON'T KNOW HOW TO CHARGE THE UNIT , NO PROBLEM. OPEN HOOD, START TRUCK,TURN A/C TO MAX WITH BOTH DOORS OPEN RUNNING AT
NORMAL SPEED, NO REVING, THEN FIND A BLACK METAL PIPE
RUNNING FROM A SILVER DEVICE CALLED AN ACCUMULATOR.
THE PIPE WILL HAVE A CONNECTOR, JUST UNSCREW THE CAP
AND PLACE FREON HOSE WITH THE CAN CONNECTED TO IT AND
SECURE THE END OVER THE PORT VALVE. OPEN FREON VALVE ON THE CAN AND PLACE UPRIGHT AND LET IT SIT. WHILE INSTALLING THE FREON, FEEL THE VENTS BY THE DOORS OR
DASH TO SEE IF THEY ARE GETTING COLDER. WHEN THE VENTS ARE COLD YOU CAN TURN THE VALVE OFF ON THE FREON CAN
AND DISCONNECT IT FROM THE FITTING AND PLACE THE CAP
BACK ON THE VALVE. THAT'S ALL THERE IS TO IT. YOU CAN ASK THE PARTS STORE CLERK WHICH PORT IS FOR CHARGING THE UNIT IF YOUR UNSURE. THEY ALSO SELL R-134A FREON WITH A
SEALANT MIXED IN WITH THE CAN JUST IN CASE YOUR UNIT MAY HAVE A LEAK IN THE SYSTEM. REMEMBER, **NO REVING** NO
MATTER WHAT ANYONE SAYS. THE SYSTEM WILL NOT CHARGE FASTER. IF YOU WANT FASTER CHARGING THEN KEEP THE CAN WARM. FREON WORKS WITH AMBIENT TEMPERATURE WHICH
MEANS WARM DAY OR CAN IS FASTER THAN A COLD DAY AND
A COLD CAN. FREON MOVES FASTER WHEN HEATED.

Apr 10, 2010 | 2008 Ford F 250 Super Duty 4WD

1 Answer

Rear A/C Not getting Cool


The first thing that you will need to know is if the system is charged(with freon) to the proper level. The reason for this is if the system is not completely charged, then the rear a/c will be the first not to work properly. The next thing you need to do is follow the a/c lines all the way to the rear of the vehicle. You may need to remove one of the rear interior panels for the next step. Here you will need to follow the A/c line to a little box or valve, this is called an expansion valve. The expansion valve is actually what sprays the freon into the evaporator, and creates the cold. If the line in between the valve and the evaporator os not cold, then you will need to replace the expansion valve. To do this you will need to remove the freon before you replace the valve. This is a common problem, because the valve contains a small screen that will stop up with trash and will restrick freon from flowing into the evaporator. Let me know if you need any further help.

Aug 21, 2008 | 1994 GMC Suburban

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