Question about 1997 Chevrolet Lumina

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Where is the low pressure port to fill ac - 1997 Chevrolet Lumina

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The low pressure port should be on the Accumulator, that's the silver cylinder that has the low side A/C line going in to it. You'll see the valve on the cylinder for you to add the R134a, do not aver fill the system. Safest way is to open and close the refill valve and let the A/C run for 2 min and see who cold the system is getting adding little at a time. To much R134a in the system will also give you poor A/C performance, to high of pressure in the system will shut down the compressor also.
Thank you for using fixya and when you think the air coming out of the vent is cold enough, stop charging the system.

Posted on Jun 02, 2010

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Posted on Jan 02, 2017

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How and where to add freon to a1995 sedan deville


Verify ambient temperature is above 65 degrees F.

1. Safety> - safety glasses, long sleeves and gloves, (exposure to refrigerant can cause frostbite).

2. Attach hoses to manifold> assembly, (hi, lo, and fill).

3. Remove caps from service ports, (Low press. Larger tube from evaporator to accumulator - passenger side over fender well; High Pressure - smaller tube from evaporator along firewall towards driver's side). Verify service> ports are clean.

4. Attach low press. and high press hoses to proper service ports.

5. Start car>, reset low refrig code, and turn ac on high and fan on high.

6. Read gauges and compare with chart provided with gauge set.

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When an vehicle's air conditioning system has not been used for several months, the seals within the system start getting dry. I've never worked on a Peugeot 206 or any other peugeot before, that's why I had no idea where the low pressure ac port was. The high pressure ac port is the easiest to locate, because it is in the engine compartment, facing the car from the front, on left side of the radiator. The low pressure ac port is in the engine compartment, facing the car from the front, to the back in the center, under the windshield. The low pressure ac port and the high pressure ac port both have black dust caps. The low pressure ac port is the smaller of the two.

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2 Answers

Where is the low pressure port ?


That port would be located at the rear of the passenger side fender well under the hood. It's kind of against the firewall. Be carefull of moving parts as the front of the engine is right there. Good luck

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Hi follow the pressure lines from the condenser and you will find the ports, one which is small will be the low side. Let me know how you make out.

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Which port on the ac system line is the one I use to recharge the system? there are 2 ports on top...


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Low pressure ac port


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You recharge the AC connecting to the low port.

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You can follow the compressor line to reach the port.

To find out which one is the low port, run the air conditioner for a couple of minutes withthe engine on.
Then turn off the care and touch the lines from compressor to the two ports , often covered with plastic caps. Only one of the pipes will be cold, the line that is cold will lead you to the low port.

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