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Re: recharge A/C whre is the Low pressure port for
It can be near firewall,or under the air cleaner box,it will be the only one the charge hose you have will fit,it will not fit the high side service port,only the low side port,rate,if this was at all helpful,thank you.
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The low pressure port is either on the black oblong canister or very close to it. Automakers usually put the high pressure side closer to the radiator. The ports are different sizes so the refill connections should not fit each other, making it harder to connect the wrong port.
First off the type of car it is would help us. Second, most times the port has a screw off cap that looks like a tire valve from the tires only bigger. If you have purchased your own freon and filler the cap will only fit and secure on the lower pressure valve. It won't fit on any other. Some cars they are near the firewall to the left or right of the engine and some are near the firewall at the back. If you look for the cap that unscrews with a metal valve under it you should find it.
The low pressure port for charging the A/C system is located on the larger aluminum tube coming from the A/C compressor. It is usually located in the tube line near the accumulator. That is an alumninum cylinder about the size of a soda can or slightly larger usually located close to the firewall along the left fender side well. It will have a plastic screw on cap on it, usually stamped with an "L" on top. Your recharge hose will only connect to the low pressure side, the high pressure port is a different size valve for safety reasons. You can only get an accurate pressure reading with the engine running and A/C running at max cold. blower on high speed, after about 5 minutes of A/C operation. Temperature outside will also have an effect on the pressure reading, optimum ambient air temperature of 70-80 degrees farenheit. Directions for recharge are on your R134a refill kit, but the system does require 20-30 PSI for the compressor to kick on. If your compressor is engaging while you are refilling, you can probably do it successfully. If your pressure is extremely low and compressor does not kick on, you most likely have a leak in the system which will have to be found and fixed before you can charge the system......Mike
It is an aluminum line that goes from the firewall to the compressor--this is the low pressure or return line. There is a second smaller line that goes from the firewall to the radiator--this is the high pressure line. The system is charged using the smaller port on the larger, low pressure line. The port looks like the valve on a tire, but is larger. There is a similar port on the high pressure line, but it is larger yet, and your recharge hose will not fit on it. Please let me know if you have more questions, and thanks for using FixYa.
The good news is a that vehicle has R134A which means the quick release from your refill can will only fit the low pressure side which is normally a little higher than the High. Unlike the old R22 systems the Low and High pressure connections are slightly different in size.
The low side port is located near the firewall at the back of the engine compartment near the right strut tower. It has a black plastic cover similar to a tire valve. Do not connect to the high pressure side which on my vehicle is located towards the front of the right side near the radiator. You will need R-134a and a connector kit. If you have leaks they should be corrected before recharging.Thanks. Keep updated for any more query. You can rate this
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Hi, determine if your car uses R134 or R12 refrigerant. You will notice screw type connectors on the both the High Pressure Side and Low Pressure Side lines in models using R12 refrigerant. R134 compatible models have quick connect valves on both sides. Models made before 1995 may use the old R12 refrigerant. If this is the case, you must have your Chrysler's air conditioning system retrofitted to use R134 refrigerant. Mixing R12 and R134 refrigerants is dangerous and may cause damage to your vehicle.
Check your air conditioning system pressure using an automotive air conditioning pressure gauge. Keep in mind that in order to get an accurate reading, the air conditioner has be turned on the coldest setting with maximum blowing power.
Remove the Low Pressure Side port valve cap and set it aside. The location of the port varies, but it is usually in front of the engine block. Attach the refill hose to the port on the Low Pressure Side of the air conditioning system. The Low Pressure Side port is smaller the High Pressure Side port. Because the ports are different sizes, the refill kit hose should fit only on the Low Pressure Side port. Additionally, the High Pressure Side port will usually have a red cap or be marked with an H or the word High
Allow the air conditioner to **** the refrigerant out of the can by slowly turning the valve on the refill kit hose. Pay attention to the way you hold the can. Most kits will have you hold the can upright when you recharge the air conditioning system. It may take as long as 10 minutes to empty a single can.
Turn the valve to the off position and remove the refill hose from the port. Recap the port before closing the hood.
Let the air conditioner stay on for at least 30 minutes. This allows the refrigerant to move throughout the entire system.
mcdevito75 here, The low side of you A/C is the side you charge, follow the silver lines commimg out the firewall, they hook up to the evaporator under the dash, look for the charge port on this line from the firewall. The recharge kit you buy will only fit this port, also the port may be covered with a brass ;looking cap un screw this cap and the valve looks like the tire valve. Also follow the chargeing instructions carefully.