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Where is the low side connection - Heating & Cooling

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Outside at the condenser the big copper line is the low and the small copper line is the high side both side have a service port just like a bicycle tire valve

Posted on Jul 01, 2009


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A/C Troubleshoot,Set up gauges on low and high side. Low side reading 200 high side 550. Compressor working fine. No visible leaks. Freon blowing out on opposite side of LP connect? Hot air in car.

Check to make sure that the engine cooling fan or fans are working. Sounds like there isn't any air flow through the condenser. Also it won't hurt to wash out the condenser and radiator.

Jun 14, 2017 | Cars & Trucks

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Low Side Port Location

The low side port is in the low side line or the accumulator that the low side line goes to. The low side line is the larger of the two lines from the AC compressor. The charging hose fitting will not connect to the high side so you really can't get this wrong.

Jun 21, 2012 | 1999 Mercury Mountaineer

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Where is connection

    • Locate the accumulator bolted to the firewall on your automobile. It usually bolts to the passenger side firewall but this is not a rule. However, it will be located on the passenger side of the engine bay. The accumulator is approximately 12-inches in length, 4-inches in diameter and has at least tow large hoses extending from it. These hoses are the high side and low side hoses. Locate the metal portions of the high side and low side hoses. Each hose comprises of a hard-metal line and soft-rubber line secured together. The metal portion of the hose bolts to the accumulator. Locate the low side and high side valves. They are located on the metal portion of the hose connected to the accumulator and both have black plastic caps covering them. The high side valve is a 16mm quick disconnect valve and the low side valve is a 13mm quick disconnect valve

Jun 08, 2012 | 1998 Dodge Caravan

2 Answers

I have a 2006 Envoy, and it appears to freon is low. I purchased a can of freon from Auto Zone. Tried to put the nipple over the lower valve and it won't connect and snap in. I end up sending freon...

ok, there is a high side, high pressure line, and low side, low pressure line, for your AC. That refill can you purchased has an R134a connector. It will only connect to the low side of teh AC system as they are different sizes. If you try to connect it the best case scenario is what you described, the connector won't lock in place and it sprays every where. The worst case scenario is the can blows up. Make sure you have the can completely connected and the connector locks down or your on the wrong valve and may damage your system or injure yourself.

Jun 10, 2011 | GMC Envoy Cars & Trucks

1 Answer

Please describe how to recharge freon in a/c carrier 50BP200

Connect gas charging device (meter) on low side port open the valve (Outer unit of split a/c) big tube (Cooling side)
and check pressure a/c working time. and 5 minute working not coming cooling on low side (big pipe) connect gas container and filling slowly. System ok cooling coming low side. close the valve.

My opinion call service person.

Mar 26, 2011 | Heating & Cooling

2 Answers

I was going to recharge my air con unit with 134 refrigerant, and the connection from my kit are not compatable. Help!! 1995 pontiac grand prix 3.1

Hi,welcome to fixya.You have an r-12 system,you need a retro fit kit.thay sell them at your local auto parts store for around $50.00.Let me know how it works for you.Thank You for using fixya.........iluv2fish.........Ray......

Jul 26, 2010 | 1995 Pontiac Grand Prix

1 Answer

Low Beam Drivers Side doesn't work ... low voltage,

Power for the headlights on the Left side (High and low beam.) comes from the same fuse... The ORANGE wire and the ORANGE/BLACK are the same, they connect in the harness. If you only lack the 12v to make the light work connect them at the headlight assembly.

If your low beam also lacks ground the Left low beam ground is shared with the right low beam ground... Run a wire from left low beam DARK BLUE to right low beam DARK BLUE/WHITE.

If its not working now then your cursed, seek a witch doctor.

May 23, 2010 | 2004 Buick Regal

1 Answer

CHARGING THE AIR CONDITIONING SYSTEM Where is the valve to connect the refill cylinder?

not sure what you mean by refill cylinder, but there are two ports to charge a a/c system, low side and high side, you fill on the low side, if you are using a can you bought from wal mart or a auto parts store than most come with a small hose that connects from the can to the port, you cannot mess it up, the hose will only connect to the low side port, the high and low side ports are two different sizes, one is located on top of the engine by the suge tank area, the other is located/accessed from under the front right of the car, look for a big hose coming from the a/c compressor and just follow it till you find the port, the big hose is your low side hose.

Apr 04, 2010 | 1999 Ford Taurus

2 Answers

Where is low side ac hose for recharging located

maybe on the dryer. if your only going to put R134 in without sucking any out. then only put it in the high side with the car not running.

Aug 13, 2009 | 1995 Ford Taurus

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