Question about 1994 Ford Taurus

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My a/c needs charged. where is the port to hook up the 134a hose. The one by the right front headlight is too big for the coupler i have

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  • langfels Mar 19, 2011

    What I was looking for was the location of the low side charging port. I eventually found it, but thanks anyway



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The a/c refrigerant should be charged up using the low side port hose of the vehicle's a/c system, this hose is usually the bigger one which is the low side. never recharge the a/c system using the smaller port hose (the high side) because it can blow up your freon can and cause bodily injury. always wear eye goggles for protection when installing freon.

Posted on Mar 19, 2011


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Recharge Auto air conditioner

I just did this for my 1994 Camry. Does your camry use the R-134A modern refrigerant? Probably.

Go to an auto parts store and buy a can of R-134A with a pressure guage included. You'll need that guage so you don't overfill the system. I bought one that allows me to save the guage and buy cheaper refills int he future.

There are two AC valves. A small one, located in the left-rear of the engine compartment, behind the strut tower, just in front of where the passenger seat is located. It might have a cap on it marked "L". This is the "Low" port, and is the one you want. The larger "H" port is up near the battery, is bigger, and is the "high" port. You don't want to use that one, and besides, it won't fit the can anyway.

Locate that low valve in the left-rear of the compartment. Take the cap off (if one is still on there). Start the engine and get it up to running temp. Turn on your AC to maximum cool, fan at maximum. Follow the directions on the can. It's pretty simple.

You'll pull back on the bushing on the refill line, and then snap it onto the valve just like you'd find on an air hose. Snap it into place, and then start refilling. Make sure the can is upside down and that you rotate and shake the can to get the coolant out effectively.

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How do you connect the refrigerant to the system to add refrigerant?

but a charging hose follow the large ac line/hose untill u come to a smallservice port this is where u hook up it will be a quick coupler conector,,,it just snaps on hold coupler back push on service port and release coupler,,,start car and turn on ac high blower max air,and recurculat if it has this ,it will cycle on and off untill there is enough freon dont over charge

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1984 944, looking for the low side of the A/C system.

Should be right on the compressor.
Follow the low side hose back to the compressor.
If it has not been converted from PAG-46 refrigerant you will need to flush and refill.
If it HAS been converted to R-12 or 134a already - you will have to unbolt the compressor to charge - as there isnt enough clearance with the adapter installed to get the coupler on.... and it is charged on the HIGH side in this scenario... since the car is not on.

Evacuate PAG-46
  • Hookup gauge set to high side, low side, and vacuum pump.
  • Open valves and run vacuum pump for 30 minutes, to boil off all moisture.
  • Close valves and make sure vacuum is held. If not, there is a leak.
Then Fill with R-134a

  • Jumper low-pressure cutoff switch (next to left headlight)
  • Hook up R134 can to hoses (purge air from line)
  • This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system.
  • Open high-side (red) valve. This will let some of the R134 go into the system.
  • Once you've got as much as will go in there (putting the can in warm water helps), close the high-side valve.
  • This is very important. If you don't close the high-side valve before you start the car, the can might burst. That would be bad.
  • Start the car and press the a/c switch.
  • Open the low-side valve (the one going to the compressor) and let it s uck in the R134. S uck s uck s uck.
HERE is the TSB for conversion if you're interested.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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Air Conditioning

#1 you will need r134a freon. #2 the low side service port is located right at the firewall where tha line goes to the evaporator. #3 if wou bought a can of 134a freon with a hose that will hook to it, it will work. all service fittings for 134a freon are the same even though the high side and the low side will always differ

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