Question about 2001 Buick Regal

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Ac system in my car

Am looking for the low side, can you help me find it

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Hello scappy30344: My name is Roger and I will answer your question for you. On the driers side of the engine compartment. You will see the accumulator. This will be a round cylinder devise that the A/C suction line runs to. On one side of it you will find a screw on cap. This will be the charge port. On the opposite side is the low pressure switch.
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Posted on Aug 01, 2009

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If you can see the a/c compressor follow the hoses up to an area that you see either a blue or a black plastic cap remove that plastic that will bw the sercice port if the can of R134a will fit on that fitting that is the one..if it will not fit than that is the high side and you need to keep looking for another plastic cap...

Posted on Aug 01, 2009

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With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the freon and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 

Both low and high side readings are lower than normal, this indicates a cars AC system is low on refrigerant and is under-charged.

If both low and high side readings are too high, this indicates an overcharged system - too much refrigerant. This also can indicate that the condenser fan is not working, is too slow or the car is overheating and heat is transferring from the radiator to the condenser.

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