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How to change the freon and where is it located

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You should mean charge the froen, low side port should be on drivers side area near motor coming off the compressor.

Posted on Aug 15, 2010


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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

2 Answers

My 98 chevy silverado will not take freeon what do i do

Most likely the Schrader valve is jammed and you will need to change it. It is looks like a inter tube valve an is located where you are trying to attach the Freon to feed the system. Take a small screw driver and see if the valve moves down when you push on it and if it sprays Freon out. Be sure you are not overfilling the system.

Jun 15, 2014 | 2006 Chevrolet Silverado

1 Answer

Low pressure valve for ac

In general the Low-pressure valve is a safety feature to protect the A/C compressor from damage. The valve can be changed without too much effort, sometimes the spring inside can become weak and activate at a different pressure than designed. With strong grip, it can be changed by hand, using care not to twist the a/c lines it is mounted on. It has an electric connector which has clips to secure it and they must carefully be unlatched.

There are 2 valves which are similar in appearance and the low-pressure part is closest to the black oval tank or even mounted on the black oval tank. You want to be sure to change the correct one. This will only help you IF the original part was defective.

When this part is working properly, it prevents the A/C from working when the Freon is low. If the Freon is low there are many possibilities why this happened. Each car is an individual case. Depending on the size and location of the leak, sometimes an additive in a new can of Freon with a sealer/conditioner can help. Sometimes too much air leaks into the system and it needs to be purged and you start over fresh.

Autozone has loaner tools to create a Vacuum in the system, measure the pressure in the Freon lines and do other repairs. It is a free program with refundable deposits.

You can go to an autoparts store and ask to see the correct part. The clerk may even look under the hood of your car to show you where it goes. If the valve is bad, replacing it can fix the problem.

You should not lose but a whisper of Freon when switching this part. But if the part is good, you need to address the low pressure. Freon has gone up so much that a mistake is costly. Use to be that you would try adding Freon first to solve a problem when Freon was $2.50 a can.

Also watch for the size of the can of Freon. Many shady ads will sell you short cans of Freon at a "discount" price. You pay less but get less.

Since each car must be judged by inspection results, its a specific call on what to do.

May 28, 2012 | 1994 Buick Skylark

1 Answer

Need to change or clean out Orpheus tube. replaced hoses and compressor every thing check out good but after running ac for a while the clutch fan wont stay ingadge was told it could be a clogged Orpheus...

If the compressor cycles (turns on and off) frequently, and the AC is just cool, then you are likely low on freon. Did you evacuate (pull a vacuum) the system before charging it with freon? This will also cause your problem. The orifice tube is located within a high pressure hose near the radiator or the firewall. Look for diameter size differences in the lines at connections.

Sep 03, 2011 | 2004 Ford Taurus

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My AC wont blow cold. As soon as I put freon in it, it blows cold for about an hour, then hot again. My friend told me that the orifice tube in his car needed to be replaced because it was convertine the...

Sounds like you might have a leak. If you charge the system and works for a time ,(hour, week, year) and then quits it sounds like perhaps the freon is leaking out somewhere. Freon does not ever get converted to air. Freon is in several states of existance while it is in your system. It is a high presure liquid, high presure gas, low presure liquid, and a low presure gas, but it is still always freon.
The valve your friend is talking about is called an expansion valve. What it does is to take the high presure "liquid" freon and allows it to pass into a low presure zone called an evaporator at a regulated rate. When you take freon at a liquid state high presure condition and expose it to a low presure environment it "evaporates" ( thus the name evaporator) and it gets very cold when it does this. This is where the cold air you feel coming out of the vents is made.
But the freon is in an enclosed system. By this, I mean it is never exposed to air, moisure (water), or anything else. I goes through all of these changes while inside this enclosed system.
Therefore, if the enclosed system is good then the amount of freon inside it will not change. If the amount of freon doesn't change then adding more will only make things worse.
I would suggest having the system checked with a hologen leak detector and/or system dye to find the leaks. Remember, if you have to add freon, then the freon that was there before must have escaped from somewhere.
Find a reputable shop to check the system for leaks. If it is leaking bad enough to run low in a hour it should be an easy to find leak.

Apr 13, 2011 | Chevrolet Cobalt Cars & Trucks

1 Answer

My a/c on a 99 miata stopped working all of a sudden. When I push the a/c button the RPM changes and it sounds like the a/c is kicking on, the fan blows, but no cold air. Any clues on where to start...

Check your freon level, sounds like you lost it all, blown out a gasket/seal on one of the lines. use freon with UV in it and get some UV galasses from the parts house to locate your leak. Repair the leak before installing alot of freon. You might take it to a mechanic and have him pull a vacuum to find the leak instead of using that extra freon, your choice.

Oct 20, 2010 | 1999 Mazda MX-5 Miata

1 Answer

What is the purpose, and what is the proper location of the orifice tube in the air conditioning system on my 1991 chevy silverado?

The orifice tube restricts the flow of refrigerant to the evaporator. This restriction allows high pressure liquid freon to change into low pressure freon before entering the evaporator. The orifice tube is located inside the hose running between the condenser and the evaporator. You'll need an orifice tube removal kit if you are looking to remove it.

Aug 23, 2010 | 1991 Chevrolet Silverado 2500

1 Answer

1999 Dodge Ram AC blows cold at idle and up to 40 mph

Most likely the orifice tube/expansion valve needs to be replaced. Depending on the type of system, you will have one or the other but they both perform the same function. The expansion valve is typically located at the evaporator inlet. Orifice tubes can be located at the evaporator inlet, in-line between the condenser and the evaporator, or in the condenser outlet. You will have to discharge the system in order to replace. Not very hard to do.

Jun 08, 2009 | 1999 Dodge Ram

1 Answer

Air Conditioning

#1 you will need r134a freon. #2 the low side service port is located right at the firewall where tha line goes to the evaporator. #3 if wou bought a can of 134a freon with a hose that will hook to it, it will work. all service fittings for 134a freon are the same even though the high side and the low side will always differ

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Aug 18, 2008 | 1998 Oldsmobile Cutlass

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