Question about 2003 Kia Sedona

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Where is the low pressure line on the air conditioning system?

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Right by the windshield wash fill spout

Posted on Aug 01, 2009

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Should be next to firewall its on the large hose coming off compressor

Posted on Jul 30, 2009

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SOURCE: locate the low pressure air

IS IT IN A CAR / WHAT KIND OF CAR ???

Posted on Jul 22, 2010

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Just replaced ac compressor and still not working. replaced a relay also. What would keep itfrom coming on?


Could have a faulty low pressure switch.
The low pressure switch is located on the air conditioning line in the right rear of the engine compartment near the firewall.

The low-pressure switch in your air conditioning system is used to interrupt power to the compressor when the low side pressure drops below 25 psi. This prevents freeze-up of the system and possible damage to the compressor. When the switch is faulty, the symptoms of freeze-up, or no compressor function, will be present. Replacement is straightforward, but requires the removal of refrigerant from the system.

Jul 03, 2015 | 2003 Kia Sorento

1 Answer

On 2005 bentley continental


there are two pressure sensors in an ac system . One is to measure high pressure and one is to measure low pressure. The high pressure will be on the high pressure line to the condenser and the other will be on the low pressure line . They can be either at the receiver /dryer on the steel lines next to the compressor

May 19, 2014 | 2005 Bentley Continental

1 Answer

Air conditioning stopped working step for trouble


There are several ideas on test gauges for A/C pressure. You need to find out if you have any Freon pressure in your system. Low pressure will activate a cut-off switch to protect the compressor from seizing.

If you look at the passengers side of the Firewall, under the wiring bundle attached to the Firewall, the low pressure fitting is on the black oblong tank. The pressure cut-off switch is on a A/C line leaving this tank.

You can by-pass the cut-off switch with a wire loop to see if the compressor engages and what the running pressure is for the system. You can work with low pressure better than some other problems.

There are Freon cans with sealant and conditioner which can fix minor problems. Once you get enough pressure to deactivate the cut-off switch the Freon should be pulled into the system.

Have windows open, A/C on Max, and then use the gauge to keep from overfilling the system.

Oct 16, 2013 | 1999 Ford Expedition

1 Answer

I have a 97 suburban. The A/C clutch engages (and I have cold air) then with disengage (warmer air) and later engage again. I cannot figure this out.


It sounds like you have a low freon condition in the AC system.
1. Go to the passenger side fender and look over the fender and to your left.
2. There should be a silver aluminum looking cannister that has an Air conditioning line attached.
3. Look for a little sensor with a plug attached (probably has 2 wires)
This is your low pressure AC cutout switch.
4. Unplug the connection and cross the two wires together with a paper clip or small cotter pin.
This will bypass the low pressure cutoff.
5. If the AC runs continuously when you do this.. then you have low freon in the system or a faulty low pressure switch. (Do not run the system permanently like this.. it could damage your compressor)

Best of luck..

Aug 18, 2011 | GMC Suburban 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

Recharge air conditioning system.


FOLLOW THE AC COMPRESSOR LOW PRESSURE TO THE ACCUMULATOR AND EVAPORATOR LINE GOING INTO BACK LOWER FIREWALL LOOK FOR A LINE WITH A BLUE CAP ON IT.THATS YOUR RECHARGE PORT.

Jul 18, 2010 | 1997 Pontiac Bonneville

2 Answers

Low-pressure port I need identification


Basic AC system consists of Compressor pump (on engine), Condenser (front grill with radiator) and Evaporator (Firewall). Pump has two ports output (high pressure) and return (low pressure). Follow lines from pump. High side is usually between pump and condenser. Follow lines and find second port this will be low side (refill) port. Paint or replace port caps (red high, blue low). Also, refrigerant in system determines port size (R12 or R34).

Jun 24, 2009 | 2001 Chevrolet Malibu

1 Answer

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.

Jun 13, 2009 | 2003 Chevrolet Silverado 1500

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