Question about 1996 Chevrolet Corsica

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My ac work for a month or so if i put a can and ahalf of freon in it. but it blows the freon but the popoff valve will blow it all out .at idle the pressure is normal. do i have a blockage some where?

If i put more than a can and a half in it it blows it out alot sooner.

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Yes you either are overcharging for you have a blockage at the Fixed Orifice due to a compressor coming part..

Posted on Feb 23, 2012

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Posted on Jan 02, 2017

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SOURCE: i need to add freon gas to my AC system. Which is

the low pressure is the wider pipe.

Posted on Jun 27, 2009

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Hi I bought a used volve about 6 months ago. Lately when I use the ac the far left vent blows out warm air and it also is not blowing out as cold of air as it used to. I was going to add some more freon...


> I was going to add some more freon and the gauge that came with the can does not fit the valve. There are normally two valves on the AC lines; one is the low-pressure valve (inlet to the compressor), the other is a high pressure line leaving the compressor and going into the exchanger. The low pressure valve is the point at which Freon is added and pressure is measured with a single valve. The high pressure valve is customarily used only by service personal to determine compressor performance and should never be used to recharge the system; they are intentionally different to avoid rupturing the the Freon container. Trace all of the lines to be sure if you have found the right one to use for recharging and measuring the 'low' pressure side.

Aug 24, 2010 | Volvo V70 Cars & Trucks

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A/C is blowing hot air. Freon is full, compressor


Not sure how you know if the freon is full without the unit running. There are a number of switches which can keep your A/C from coming on. There is a low pressure switch which is usually located on the larger line and sometimes located on a silver cannister (called an accumulator) which is the low side of a compressor circuit. There is also a high pressure cutout which is usually located on the back of the compressor unit. Both of these switches can be jumpered out to see if they are the reason for the compressor not working. You remove the two wire connector to either switch and place a small jumper wire between the two wires on the connector block. The other reason my be a low idle cutout switch and this will also usually be located near on on the compressor. You can also test it the same way as the other switches. If it is the low pressure switch then of course you will need to add freon which you can purchase from any auto parts store. They usually come with instructions and all the equipment needed to add in freon. If it is high pressure, then some of the freon should be recovered from the system by a technician. If is the low idle cutout then you will have to take it to a mechanic to understand why it is idling so low. Hope this helps.

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Ac works fine except when i exclerate or go up a hill, it seems to cycle or stop blowing...then the continues to work fine but this is happening more often . I just got my ac repaired 3 months ago. it...


sounds like u still have a leak and need to have freon added or wasnt fully charged --when ur at idle or lower rpm the compressor will circulate the freon fine and will not cause a problem when u put a load uphill passing or increase the rpm a little more the compressor sucks more and circulates more freon which gives u a lower suction pressure if the suction pressure gets to low the the a/c protects itself and the engine by turning off [low pressure safety] cycling if had done 3 months ago bring back and have tested or u can buy some freon and add to ur system yourself

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I need to add 134 to the system, it's not blowing cold


First of all, you need to check if the belt is tight, if the electric clutch is turing on and off with the switch, and if there are bubbles in the receiver/dryer cylinder sight glass.
If you add so much freon that the pump has liquid in it, it could blow it up.

But you buy freon with a short hose and valve.
Wear eye protection and gloves.
Then you attach the can to the valve on the side with the thick hose.
There will also be a valve on the skinny side hose, but do not attach freon there. That is only for measuring with a gauge.
The open the freon valve and start the engine and AC.
If the can frosts up, you can put it in a bowl of warm water.
Watch the sight glass until the bubbles stop.
Then close the freon valve.
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Disconnect freon can.

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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.

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