Question about 2001 Hyundai XG300

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My 2001 hyundai xg300 is not blowing cold air from the ac. I hooked up a artic frezze 134a to the low side port and got a reading of 140psi on the gauge while the ac was running. This was way in the red. What should I do?

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  • Hyundai Master
  • 6,826 Answers

Have a mechanic check it with his ac gauges,if this is so,then the compressor is shot.

Posted on Jun 03, 2010

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jun 03, 2010

    Are you sure the ac compressor is running?Is the center of the pulley on the compressor turning,and is it turning as fast as the pulley on the out side or just turning a lot slower?If this is the case,there maybe a clutch coil problem.

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2003 ford focus no cool air is blowing out. Could it be the evaporation cord?


Make sure your blower fan is turned on and is blowing air. When you push your a/c button the yellow light should come on. If it is not blowing cool, it could be several things. Low on 134a or the control that has the a/c button on it could be bad or blown fuse, bad compressor, etc. If the air is cool but not cold the 134A is low. If it is still blowing hot, check and make sure that the clutch on the compressor is locked in. It most likely is not. Check ac fuses and ac relay, if they are good, check the 134a ,if low, refill it. This should fix it. Remember that if the a/c clutch is not locking in, you cannot add 134a because of no circulation.On some vehicles, if it is completely out of 134a, the relay will not trip and you will have to bypass the relay to provide power to the compressor to fill it. If you do all of these and it still does not work, you will need to take it to a professional. If you need to, reply back and I will give you more possibilities.(I think that you mean evaporator coil)

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1 Answer

My ac blows warm air


You need to hook up a set of AC pressure gauges to the low side charging port and read the system pressures with the AC compressor turned on and running, it should be around 28-32 PSI. If the compressor press is correct you have some other problem like a broken air temperature control blend door inside the dash air ducting.

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Where is the AC overflow discharge valve in a 2001 hyundai sante fe v6? I overcharged my ac and it burst ac out for 4 seconds as I was charging then immediately stopped but it happened so fast that I...


There is a high pressure relief valve on the compressor to avoid over filling the system and locking up the compressor, or blowing a A/C hose, ect.,
You need a set of gauges to do it right (connected to high and low ports) then read this.
http://www.denlorstools.com/autoblog/2009/04/adding-freon-to-car-ac-gauge-readings-explained/

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Oct 05, 2009 | 2001 Hyundai XG300

1 Answer

How do you check the high pressure on the air conditioner for a 1997 volvo 850


Do you have ac gauges?You can only check with set of 134a gauges.Hook the red hose of the ac gauges to the large ac port on the high side ac line(it is the small ac line/hose).Do not turn the red knob on (on the ac gauges)If need to hook up low side(blue hose)to the small ac port on the low side line(it is the large ac port).If I can help,let me know.

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2 Answers

I have a 1999 Chevy Silverado, the a/c works fine for a while then blows hot. If I turn a/c off for a while, it will cool again, but after a little while, will blow hot. What could it be?


ok sounds like you may need to add a can or two of 134a freon which isnt too expensive you will have to have special gauges to make sure of the correct amount of refridgerent if you over fill the system you could bust a line on your condensor or worse screw up your ac pump but you can find 134a at all your local auto parts stores when you put the freon in you want the vehicle to run and the ac on high all the way cold and when the can is punctured shake it constantly until empty one way to cheat without using gauges is to hold you hand on the low pressure line when it gets cold that means you almost got it done make sure you do not connect the can to the high pressure side because you can blow up the can in your hand i would start with one little can then go check to see if you have cold air if its not frezzing cold you can put another one in until you are satisfied if you need anymore help just ask :)

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2 Answers

AC booster recharge hook-up


You can only attach the the recharge hose from the kit to the low side ( A/C service port) and the cap should be blue with a leter L on it. Good luck and follow the instruction and don't over charge the system. With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the R134a and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood.  Good luck and hope this helps.

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1 Answer

The a/c on my 2006 honda pilot is not owrking and appears to have a low refrigerant charge. I want to recharge it and find the leak with die. what is the amount of 134a to be fully charged


Adding freon or topping off a cars A/C system is the most common task performed to restore performance and get cold air blowing again. However, adding refrigerant isn’t always the solution for car air conditioning problems. There can be many other things wrong besides a system being low on refrigerant. To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.

*Make sure the condenser fan comes on when the readings are being checked.

Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the R143a and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 

Hope this helps. Keep me posted, be glad to help get you cooled again. 

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2 Answers

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You need to locate the low port on the AC.

You recharge the AC connecting to the low port.

You find the AC low pressure at the top of the compressor. Near the compressor you find two ports, the high port and low port.
You can follow the compressor line to reach the port.

To find out which one is the low port, run the air conditioner for a couple of minutes withthe engine on.
Then turn off the care and touch the lines from compressor to the two ports , often covered with plastic caps. Only one of the pipes will be cold, the line that is cold will lead you to the low port.

Jun 18, 2009 | 2001 Hyundai Elantra

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