mmm

 

I wouldn't. An overcharged system will not cool correctly and if it's low on freon you need to find the leak. Freon does not just evaporate out of a sealed system.

 

mmm

 

Now you're really scaring me. How does this can know how much should be in the system since all of them have different capacities?

 

I agree with ChevyMgr....

How do you know what pressure, at what temperature, at what capacity. I have 3 different GM products, all use R134a, ALL have DIFFERENT requirements.

Cyclic....That system you speak of, is for some broken down "heap", and to be used under a SHADE TREE, IMO.

A/C systems NOW are a real science. What some of us used to do cannot be done anymore.

 

Be Very Carefull
There are two connectors, but only one is right...

 

I thought you had to be CFC certified to purchase refrigerants.

 

You need to be careful with those type of A/C kits. If you read the package most contain a sealer which is not needed in a properly working system. Further to properly charge an A/C system you need to vacuum down the system this checks the integrity of the system and also removes any water. You also need to check the pressures on both the high and low side of the system. The DIY kits only show pressure on the low side. You also need to know what the pressures should be based on the atmospheric conditions (what is the humidity? what is the ambient air temperature?) these variable will affect the system pressure.

Basically if you don't know what you are doing don't do anything! It is very easy to overcharge a system a blow out your compressor seals. And lastly it is illegal to release refrigerant into the atmosphere if you start fooling around with the system this is always a possibility.

 

You have to be EPA certified to purchase CFC based refrigerants. I bought and sold some R-12 a few years and had to get the EPA certification to do so.

 

So who is going to report Walmart to the epa for breaking the law?