Question about 1999 Ford Expedition

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Where is the low pressure side of the air conditioning

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  • Ford Master
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They can be anywhere, but usually up on the fire wall with the biggest pipe coming from the compressor. If you have one of those refill bottles, it is the only place the bottle will fit. The fitting will not go on the high pressure side. Hope this helps.

Posted on Jul 07, 2010

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Posted on Jan 02, 2017

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SOURCE: find low pressure line for recharging air conditioning

it is on the back side of the compressor

Posted on Jun 04, 2009

  • 2 Answers

SOURCE: Air Conditioning

It's on the back wall under the hood on the drivers side. I just recharged mine.

Posted on Jun 09, 2009

  • 58 Answers

SOURCE: I cannot differentiate between the low pressure and high pressure

This is a little A/C 101. Follow the A/C lines. All A/C systems have a high pressure side and a low pressure side. The high pressure side is from the compressor to the condenser coil on the front of the vehicle to the evaporator coil in the dash. At the expansion valve in the evaporator the pressure drops. At the expansion valve the refrigerant changes from a liquid to a gas. This provides the cooling. The low pressure side is from the evaporator back to the compressor. Usually the high pressure lines are smaller than the low pressure (suction) lines.

Posted on Jun 13, 2009

  • 3600 Answers

SOURCE: air conditioning low pressure sensor

find the sensor that is plugged into the accumulator on passenger side normally it Will have two wires the dryer will be silver or aluminum colored unhook the connector put a paper clip in the connector if the compressor comes on then you have it, Warning if low on refrigerant you can damage the compressor if on for a long period of time, check to see if AC gets cold turn it on to Max AC fan full blast and see it it's cold, if it is the switch is bad, if it does not get cold then it needs to be serviced.

Posted on Jun 25, 2009

emissionwiz
  • 76691 Answers

SOURCE: location of low side pressure value for a/c

low pressure line from the AC compressor, that is the larger line of the two lines comming from the AC compressor

Posted on Jun 26, 2009

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1 Answer

What is the high pressure reading for charging freon for the air condition?


For charging purposes, you really should be monitoring the low side pressure. Depending on ambient air temperature, the low side should be between 30 and 50 lbs PSI. The high side can be between 135 and 330 lbs PSI.

Sep 19, 2011 | 2006 Chevrolet Trailblazer

2 Answers

I have a 1997 oldsmobile achieva. I am trying to locate the car's low pressure valve to recharge the air conditioning with freon. Where is it? Thank you


The low and high side valves are located under the air filterbox, if you open the hood and remove the air filter box you will see the valves ,good day

May 26, 2011 | Oldsmobile Achieva Cars & Trucks

2 Answers

How to recharge recharge airconditioner


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.
Take care

Aug 03, 2010 | 2006 Chrysler Town & Country

1 Answer

Air Condition not very cold.


The pressure on the low side it not very meaningful by itself.
What matters is the difference between the high and low.
The low normally can be up to 120 psi or so, and the high side can be twice that.
But when the AC is running, the low side should drop to less than when it is off.
But there could be lots of reasons for it not being very cold.
The pump clutch could be failing to engage. The release valve should be not opening. The air flaps could be letting heater air in instead of cold. The AC condenser fan fan or relay could be bad.
Etc.

Jul 10, 2010 | 2002 Pontiac Sunfire

1 Answer

2007 Ram Truck: where is low side of ac to recharge in 2007 dodge ...


The Low Pressure Side connector will be smaller than the High Pressure Side connector so the refill hose will fit properly only on the Low Pressure Side.
Read more: How to Recharge Air Conditioning with Freon in a Dodge Ram | eHow.com http://www.ehow.com/how_4484569_recharge-air-conditioning-freon-dodge.html#ixzz0uLXJnwvE

May 17, 2010 | 2007 Dodge Ram Truck

1 Answer

Air condition blows hot air but it has freon


You may have created an over charged condition and at this point the a/c compressor will cut off on high head pressures. This can be verified by installing gauges to the systems high and low side service taps and reading the pressures.An overcharged system will start the compressor briefly but soon cuts off once pressure goes to 350 - 400 lbs on the high side. Acceptable pressures for this system should be no greater than 250 high and low suction should drop to 40-50 psi.You might recover the charge and evacuate the system,then try bringing the charge back to proper level.A sight glass in the reciever drier really helps determining proper fill.Once all bubbles have dissipated from the sight glass during charging ,one should stop at that point to avoid overfilling.Too much freon is worse than a low charge especially in hot ambient conditions....

Aug 26, 2009 | 2003 Saturn ION

1 Answer

What is the high and low pressure on 1997 toyota


The high and low pressure is refer the hose BEFORE (low) and AFTER (high) the A/C air compressor.

Low side can range from 0 (dead compressor) to 120+ (overcharged system)

High side can range from 0=dead to 170++ overcharged or damaged compressor.

DO not attempt to charge the system unless you has the correct manifold A/C unit and hoses to do the job.

Jul 16, 2009 | 1997 Toyota Camry

1 Answer

Would like to recharge my air conditioning on my 2001 nissian maxima that has 117,000 on it blows hot air when air conditioning is turned on.


You will need R134a, and a filler hose. Charge the system on the low pressure side, it should have a blue cap on the charge point.
Your filler hose will only fit the low pressure side, just in case the cap has been removed.

May 23, 2009 | 2001 Nissan Maxima

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