Question about 1998 Mazda MPV

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Where is the high pressure air conditioning coolant valve located on a 98 MPV ?  We are trying to recharge the coolant.  Found the low pressure valve - can't see the high pressure / red one...

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  • Mazda Master
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Some times they are hard to find.Find the high side line/hose,on the compressor,follow the line until you find the ac high side service port.The small line is the high side,If I can help any further let me know roniecon@gmail.com

Posted on Jul 23, 2009

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1 Answer

Where is A/C low pressure valve located?


Follow A/C lines,only one will fit,second is bigger.

Feb 22, 2016 | 1999 Mercedes-Benz S-Class

1 Answer

I am trying to put an AC recharge can into my car and can not locate the valve where the cans dispenser is to be connected to complete this...please help


Attach the end of the recharge hose to the low side pressure port on the passenger's side of the engine compartment, near the firewall. Look for the metal coolant lines and follow the lines to locate the low side pressure port. The port is usually covered by a plastic cap. Screw the discharge end of the recharge hose -- the end without the handle/valve -- to the pressure port.
  • Screw the valve end of the recharge hose onto the top of the can of refrigerant. Turn the handle clockwise to pierce the top of the can of refrigerant. Turn the handle counterclockwise to allow the refrigerant to flow into the hose.
  • Start the Cutlass. Turn on the air conditioning to the maximum setting.
  • Turn the can of refrigerant upside down and gently swirl the can. This moves the refrigerant from the can to the hose and into the air conditioning system.
  • Insert a thermometer into the interior of the center air vent and test the temperature of the air coming from the duct. It should be approximately 35 degrees colder than the ambient air temperature.
  • Add more coolant if necessary. If you are using 12-ounce cans, unscrew the first can and screw the hose onto the second can. Turn the handle clockwise to pierce the top of the can, then turn it counterclockwise to allow the refrigerant to flow into the hose. Do not add more than 24 ounces to the system. Take your Cutlass to a service center if you have added more than 24 ounces to the system and there is no difference in the temperature.
  • Turn off the engine of the Cutlass.
  • Turn the handle on the recharge hose clockwise to seal the can of refrigerant of it is not empty. If it is empty, unscrew the can from the hose. Unscrew the discharge end of the hose from the low side pressure port. Place the colored cap over the pressure port.
Retrieved from "http://www.wikituneup.com/wikit/1997_Oldsmobile_Cutlass_Charge_Air_Conditioner"

Aug 09, 2011 | 1996 Oldsmobile Cutlass Supreme Coupe

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

Where do you recharge the airconditioning unit on a 98 jeep grand cherokee 4x4 loredo? Need the location of the fill valve. I already have the recharging kit.


Jeep GrandCherokee SUVs manufactured in or before 1995 use R12 refrigerant. You must retrofit these SUVs to accept R134 refrigerant using a retrofit kit available at your local auto parts store before you can recharge the system. In some areas, a license is required to retrofit an air conditioning system. If this is the case in your area, take your Jeep to a professional to retrofit the system.

Instructions:
  1. Step 1 Take your SUV to a mechanic to recover the R12 refrigerant out of the air conditioning system. A license and special equipment are needed to do this. Because R12 refrigerant is expensive, many mechanics will do the job for free.
  2. Step 2 Locate the Low Pressure Side connector port. You will find it on the driver's side of the engine. Remove the blue or yellow cap marked L. You only need to retrofit the system if you see a screw-type connector valve. If you see a quick connect valve, the system already is R134 compatible. Wipe the connector valve off with a clean towel. This ensures that the retrofit connector properly adheres to the valve.
  3. Step 3 Place the long retrofit connector from the automotive retrofit kit onto the Low Pressure Side valve. The retrofit connector has a special adhesive on the threads that will help it adhere to the valve. Screw the connector onto the valve. Tighten the retrofit connector using an adjustable wrench. Place the cap provided in the retrofit kit onto the retrofit connector. This keeps dust out of the system.
  4. Step 4 Follow the air conditioning lines away from the compressor until you see the High Pressure Side port valve. This is located near the Low Pressure Side service port. Remove the red cap and wipe the port off with a towel.
  5. Step 5 Put the shorter adapter onto the port. Twist it using an adjustable wrench until it is securely fastened to the port. Place the red cap from the retrofit kit onto the adaptor.
  6. Step 6 Fill out the Retrofit Identification sticker provided in the retrofit kit using a permanent marker. Remove the protective backing and place it on the interior side of the hood. This lets future owners and service professionals know that the system has been retrofitted.
  7. Step 7 Recharge the air conditioning system. See the related eHow titled "How to Recharge Air Conditioning with Freon in a Jeep Grand Cherokee."
WARINING:
Never try to evacuate the system yourself. A license and special equipment is needed to evacuate the system. Attempting to do this yourself will release refrigerant into the air, which is a federal crime.

Good luck (rated this help).

Aug 10, 2009 | 1998 Jeep Grand Cherokee

1 Answer

Air conditioning doesn't keep it cool


Your system may be low on R134a and needs to be recharged, If you did recharge it with the recharge kit and you over charged it, you'll have poor a/c performance too. The low pressure side should have 30psi to 50psi and the high pressure side should have 150psi to 200psi, any other readings will give low a/c performance and if to high of pressure can lead to system damage. Good luck and hope this helps. 

Jun 23, 2009 | 1998 Honda Accord

2 Answers

2004 Lincoln LS A/C Valve


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.

Jun 21, 2009 | 2004 Lincoln Town Car

1 Answer

Air conditioner


the rear fitting is the low pressure side where you charge the system

May 29, 2009 | 2002 Mercury Sable

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