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A/C freon refill question

This is a discussion on A/C freon refill question within the General Help forums, part of the LSx Technical Help Section category; My ac went out today so I picked up one of those cans of 134a from autozone. I hooked it ...

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    A/C freon refill question

    My ac went out today so I picked up one of those cans of 134a from autozone. I hooked it up to the low side connector and the gage on the refill can broke (it pegged clockwise all the way around and now stays there). So does that mean I have super high pressure on my low side for some reason?

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    Quote Originally Posted by hix5000 View Post
    My ac went out today so I picked up one of those cans of 134a from autozone. I hooked it up to the low side connector and the gage on the refill can broke (it pegged clockwise all the way around and now stays there). So does that mean I have super high pressure on my low side for some reason?
    Was the vehicle running? If not it needs to be..

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    Sorry,

    Yeah it was running I had the ac set to recirculate and the fan on max. The compressor is not running atm.

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    Quote Originally Posted by hix5000 View Post
    Sorry,

    Yeah it was running I had the ac set to recirculate and the fan on max. The compressor is not running atm.
    The compressor needs to be running.

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    Hmm, is there a way to force it to run (jumper wire or something)?

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    Quote Originally Posted by hix5000 View Post
    Hmm, is there a way to force it to run (jumper wire or something)?
    Don't know about that but usually if you set the sellector to just the A/C (not max) setting the pump will engage. However some times in order to add 134a to a system it will need to be vacuumed out by a shop..

    The pump also engages when the defroster is used too..Could'nt hurt to check the fuse either.

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    Fuse is good. No luck with the compressor in any of those modes.

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    Quote Originally Posted by hix5000 View Post
    Fuse is good. No luck with the compressor in any of those modes.
    I'd take it to a shop @ this point IMHO. FYI r134a can blind you instantly..

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    Frostbite is fun!

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    If the system is low on refrigerant, the compressor will not run. However, as you charge it, once the pressure is enough to trip the low limit switch your compressor should engage. This is assuming the system is actually low to start with. I do not believe the cans can overcharge a system as they simply match the pressure to what the system is designed for (unless you are using something different than what I am thinking).

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    The pressure seems to be so high that the can will not flow into the system.

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    Heed Smittro's advice and take it to a shop to have it checked.

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    if it is overcharged the compressor will not come on just take it to a shop u need to have guages put on it anyway 134 is not expensive like r12 was plus if the orifice valve is clogged your ac wont work

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    Quote Originally Posted by pajeff02 View Post
    I do not believe the cans can overcharge a system as they simply match the pressure to what the system is designed for (unless you are using something different than what I am thinking).
    The cans can overcharge a system. If you hook up to the low side with the compressor running it'll keep sucking in the freon until you stop it or the system is overcharged. My friend did that to his jeep. He kept hooking up cans until the compressor was slugged with liquid freon and destroyed the compressor.

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    Quote Originally Posted by Cutlass View Post
    The cans can overcharge a system. If you hook up to the low side with the compressor running it'll keep sucking in the freon until you stop it or the system is overcharged. My friend did that to his jeep. He kept hooking up cans until the compressor was slugged with liquid freon and destroyed the compressor.
    Agreed. I forgot the low side also has a port for checking pressure. That would be a big oops.

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