Question about 1994 Toyota Pickup

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Locate low pessure side of a/c system

Locate low pressure port of a/c system

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On my '94 4cyl its located on the a/c line near the battery. A plastic cap with an L on it marks the low side ... not especially easy to get can of refrigerant hooked up with a radiator hose in the way.

Posted on Jun 22, 2010

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They are most of the time on the ac lines coming off the compressor ,right where the compressor is,the low side is on the large line going into the firewall,just follow the ac line,

Posted on Jun 06, 2010

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Air conditioning


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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My 2009 Dodge Ram 1500's AC is not blowing cold


Most likely your system just needs to be charged with r134a coolant. You can do it yourself. Just head down to the local auto parts store and buy a can of coolant that comes with a hose and gauge attached and then locate you low pressure port on you system. It is typically located on the passenger side between the radiator and the firewall on a silver tube. Don't worry you can't make a mistake as the coupler will only fit the low pressure side. When you locate it remove the cap and hook up gauge and can. Start the car and turn the AC to mac cold and highest fan speed. Then open the gauge depending on ambient temperature out side your gauge should read between 35-45 psi. The gauge should also be color coordinated as long as you don't fill until the gauge is in the red. Your good. Then close the gauge, remove it from the low pressure port and replace the cap on the port. (When the coolant is flowing into your system the can should turn quite cold and maybe even have some frost on it. No worries that is normal).

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hmm ..if you are looking for the low side air conditioner port .. then locate the condenser (thats in front of and looks like the radiator) .. you will notice two tubes going to that ..one is large the other small .. the small tube is the high pressure side .. the large tube is the low pressure side ... follow the large tube back until you find a cap that covers the low pressure port .. thats where you would fill with new refregerant (r134a) .. if you buy r134a, you can also get a filler hose and gage.. that hose will only hook up to the low pressure port ..it wont fit the high pressure port ...

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Did you check the acumulator? There is a port on it, that is the low side port. Keep in mind that if you have to recharge the system it is because other parts need service (leak in the syst) and whatever refrigerant you put in it will leak out again. The system may work temporarily or may work inefficiently. Also may sure that there is oil in syst.

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Locating the High side and Low side AC gas ports


Easy. find the compressor. The larger hose attaching to the compressor is the "suction" side. This is where you install the refrigerant.

The smaller hose, whether rubber or metal as it travels to the passenger compartment, is the high pressure side.

After installing refrigerant and as the compressor is running, the larger hose will feel cool and the pressure side will feel hot.

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In order to charge, you must locate the low pressure valve to install the refrigerant. The low pressure valve is between the compressor and the evaporator. Do not charge on the High Pressure side, The high pressure valve is between the compressor and the condenser. To locate the low pressure valve, follow the line that comes from the compressor and routes toward the firewall. The valve will be somewhere on that line. Do not overcharge. The amount of pressure that is needed on the low pressure side will depend on the ambient outside temperature.

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Where to locate low pressure port


both of the a/c service ports should be located next to the pass. side strut tower. the low side adapter may be hard to find though. If youcan not find it there, it is possible that the low side port could possibly be at the dryer on the drivers side front up beside the condensor

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1 Answer

1995 Ford Explorer A/C


its on the passengers side of engine comparment,locate the a/c dryer, the low pressure fitting should be located just off one of the lines coming from dryer.

Jul 27, 2008 | 1995 Ford Explorer

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