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I just purchased the freon can for my truck, but the can says to attached the hose into the low valve and I could only find the high pressure valve. I'm using the 134R it's that correct or should I use the R12. Please let me know. Thanks

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You want to use the R-134. But you have to locate the low pressure port in order to charge it. I am not aware of its position exactly due to variations between models and years but if you follow the lines off of the compressor you should eventually run into a low pressure service port. However you do have the correct freon for the vehicle.

Posted on Mar 19, 2011

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How and where to add freon to a1995 sedan deville


Verify ambient temperature is above 65 degrees F.

1. Safety> - safety glasses, long sleeves and gloves, (exposure to refrigerant can cause frostbite).

2. Attach hoses to manifold> assembly, (hi, lo, and fill).

3. Remove caps from service ports, (Low press. Larger tube from evaporator to accumulator - passenger side over fender well; High Pressure - smaller tube from evaporator along firewall towards driver's side). Verify service> ports are clean.

4. Attach low press. and high press hoses to proper service ports.

5. Start car>, reset low refrig code, and turn ac on high and fan on high.

6. Read gauges and compare with chart provided with gauge set.

7. If low and high press readings are both low, then system needs recharge.

8. To recharge, attach fill hose to can of R134a and slowly open low press valve>, (NOT HIGH PRESS VALVE), until low press side reads 40 psi.

9. When flow stops and pressures stabilize close valves> and disconnect manifold from service ports and refrigerant can. Replace service port caps.

Aug 19, 2015 | 1995 Cadillac DeVille

1 Answer

A/C won't **** in the Freon


Close all valves, connect the can to hose, start the engine and set the A/C to on high and then open the can valve. I know you have the lines connected right cause they'll only go on one way. Open the low side valve on the gage set to let the Freon into the compressor. It will suck the Freon from the can completely. If not completely empty, set the can in a bucket of hot water and I guarantee it will empty. If this doesn't work friend, there's something wrong in your system. Possibly need to replace the nozzle. It has to work though. There's no changing these phisics.

Jul 07, 2017 | 2000 GMC Sonoma Extended Cab

1 Answer

What is the correct pressure for freon in AC unit and what is the color of the cap where you add the freon?????


The charging port cap is usually blue, The charging fixture hose will not clip onto the wrong port, so you really can't mess that up. the pressure of a system as measured on the low side hose should be about 28-32 PSI with the system stabilized and engine at operating temperature.

Jun 26, 2012 | Cars & Trucks

1 Answer

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

I cannot charge the A/C. It will not accept the freon. 2007 ram 3500 6.7 litre diesel, I bought a tall can of freon with stop leak and it has the hose attached. It hooks up correctly to the receiving port...


you need to 'bridge' the terminals on the schrader valve (low pressure cutoff) to force the compressor to run. It should be located on the receiver/dryer, carefully strip a small section of insulation on the two wires just above the connectors, and bridge them with a piece of wire-when compressor runs, the freon will be drawn from the can into the suction port.

Jul 06, 2011 | 2007 Dodge Ram 3500 Quad Cab Laramie

1 Answer

How to add freon to a 1987 Mercedes 190e 4cyl


You need to use a pressure manifold gauge:
http://www.amazon.com/Pit-Bull-CHIMG777-Conditioning-Manifold-Gauge/dp/B000VAQQ3Y/ref=sr_1_3?ie=UTF8&qid=1374522452&sr=8-3&keywords=r22+pressure+gauge
Connect the red hose to the high pressure side located in front of the radiator, connect the blue hose to the low pressure side located in front of the fuse box, there is a thick metallic tube that has a tire-style cap, unscrew that and attach it, purhcase R-12 refrigerant can of at least 1kg, then attach an adapter to the can and connect the yellow hose to this part, open up the flow valve and turn the can upside down while your car is running and the A/C is on.
Check for pressure, the high side should have a high pressure and low side should be as low as possible while the compressor clicks on. Google for the exact pressure numbers as I don't remember.
Just make sure that the AC compressor located at the bottom of the belts is engaged, this is engaged by the correct pressure setting automatically

Mar 16, 2011 | 1987 Mercedes-Benz Mercedes Benz 190 Class

1 Answer

Ac charge for 2001 chevy malibu I need to find the right pressure port on the fire wall a picture would help or really detailed instructions i found one pressure port but it was to large for the hose i...


If you are gonna charge Freon, you are looking for the LOW SIDE pressure valve. Most of the time its located on the low pressure hose or the evaporator itself.Look for a HUGE black cap most of the time its that color your freon can if it came with a hose attached will only fit the low side connection.

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Aug 25, 2010 | 2001 Chevrolet Malibu

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

How do you recharge the AC in a 2004 Dodge Stratus? Is that usually the problem when it is nt blowing cold air?


Yes. You can get a recharge kit at your local parts store. You can get cans of freon with hose attached. You will need to start the car and turn the ac on full blast. If you follow the ac hoses you should find two caps that cover valves. 1 is high pressure, the other is low pressure. Take the cap off the low pressure (it is smaller). Test to see if the hose end will attach to the plug. If so, that is the one. MAKE sure that the compressor clutch is kicking in and out-you should be able to see and hear it. This is the front part of the compressor where the belt turns. If low on freon it will be doing it fairly fast. Shake the can real good before you start. Twist the "t" handle down to pierce the top of the freon can. Then back it out. Hold the can upside down and keep shaking ocassionally.The can should start getting cold in your hand-that slows the freon is going out. and the compressor should run for longer periods. You may need more that 1 can, maybe not. You may want to get the can that has oil charge and stop leak/leak detector in it as well.

Mar 19, 2010 | 2004 Dodge Stratus

1 Answer

A/c compressor kicks off and on while idling and blows hot until


Immediate thought is a Lack of Freon in the system, or possible failing, of the Low Pressure Switch in the Hose line, that energises the Compressor Clutch.
An inexpensive get out, is to purchase a DIY can of FREON, that includes Compressor Lubricant and inject it into, the High Pressure Freon Hose port.
Regards, DT

Sep 07, 2009 | 1996 GMC Jimmy

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