Question about 2003 Kia Sedona

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AIR CONDITION WILL NOT COOL IN VEHICLE. COMPRESSOR RUNS. LOW SIDE PRESSURE IS 35 AND HIGH SIDE IS 225.

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  • Kia Master
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Try testing this pre-diagnostic... if the blower is completely dead and is not providing any air movement, the cause could be in the resistor block for the fan motor or the fan motor.

1.- If you have one or more blower speeds, the problem is the Resistor Block. This part (resistor block) controls the various speeds of the blower motor. It is located on the passenger compartment side of the blower housing and can be replaced in few minutes. You can find the part online for around $10.

2.- If you do not have any speeds, you should verify the Fan Motor works by pulling it and connecting it to a 12 volt DC power source. To pull the fan motor, you will have to remove the glove box to gain access to the 3 or 4 screws that hold the fan in place, although I did it without removing the glove box. The motor is attached to a large mounting plate that is at the bottom of the air plenum located behind the glove box. If you look up from the passenger floor you will see the motor hanging down. Once the connector is disconnected and the screws are out, you will have to turn the mounting plate to allow the motor to drop. Keep in mind the position as you pull it down as it needs to go back in the same twisting fashion.

Tell us news.

Posted on May 15, 2010

  • 1 more comment 
  • jimv621 May 15, 2010

    BLOWER WORKS FINE AND HAS ALL SPEEDS. I AM THINGING THERE IS A DOOR THAT IS NOT OPENING TO LET THE AIR CONDITIONER WORK BUT WHERE DO I LOOK FOR THIS

  • ZJ Limited
    ZJ Limited May 15, 2010

    OK, You are referring to the BLEND door inside the heater/evaporator case
    which moves when you select HOT or COLD air, it diverts air from the hot
    heater core or the cold evaporator core.
    You can bypass the blend door as a culprit by crimping off both
    heater hoses going to and away from the heater core so NO hot coolant
    gets inside the evaporator case. This will NOT cause the car to
    overheat etc etc it will just not allow hot coolant inside the dash of
    the vehicle.

  • jimv621 May 15, 2010

    THE HEAT VALVE AREADY DOES THIS BECAUSE WHEN I TURN THE KNOB FOR HEAT IS PUTS OUT WARM AIR BUT WHEN I TURN IT TO COOL THE AIR IS THE SAME TEMP AS WHAT IT IS IN THE VEHICLE.

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3 Answers

Can youput to much freon in and what will it do


4 cans will be too much
it makes the compressor pump liquid instead of gas and that damages the compressor
it the compressor is still capable of pumping gas then it will go to high head pressures and that will switch the compressor off
you have wasted your money, run the risk of expensive compressor damage , didn't fix the leak that required the gas
The specialist ac shops are not there to take your money but to give you a system that runs without problems so use them to fix the faults and put the right amount of gas in using gauges not cans

Jun 20, 2016 | 2009 Chevrolet Chevrolet Cobalt LS

1 Answer

98 expedition with dual air. pressures were 50 and 225 at idle at 90 - 95 deg outside. Compressor cycled and air got warm when driving. Added 12 OZ of freon. pressures went 60 and 250. added another can...


sounds like the expansion valve or the orfice may be clogged is your compressor making noise like a clinging inside if it isyou'l need to change the accumlator dryer as well as expansion or orfice along with the compressor. you could try what are the pressures with a fan in front of the vehicle if they go to 35-40 psi on low side and 200-250 psi on high side these are close to where they should be.

Jul 07, 2012 | 1998 Ford Expedition

1 Answer

The blower works on my 1998 Ford Escort but the air conditioning does not get cold. How do I know if it just need freon or if it is the compressor?


does the a/c get cool but not cold? if so then may just need some freon. check the low pressure side with the engine idling and blower set to high and on MAX a/c. the low pressure side should read between 35-45 psi , if it is lower than 35 then add 1 can of freon to see if pressure comes up , if it doesn't then you may have a weak compressor or a clogged orfice tube. but if the air is hot and not even cool the you may have a bad comprossor clutch, check to see if it is coming on.

Jul 27, 2011 | 1998 Ford Escort

2 Answers

What the high and low refrigerant pressure for a 1995 eldorado?


The actual proper level of refrigerant is determined based on the ambient air around the outside of the vehicle, when and where it is being tested and or serviced.

Essentially the low side PSI should be around 35. As this is the mid range for an average of 70 degree weather. That can include 65 degree upwards to 75 degrees.

In order to properly answer your question, or be more specific. One would need to know the air temperature of the environment surrounding the vehicle.

Most cannisters of refrigerant include a template guide and directions on the back to enable you to adjust the PSI Properly

Such as knowing how taking an accurate reading of the PSI can only be established if the compressor's clutch is engaged and the system is set and operating,

Jun 12, 2011 | 1995 Cadillac DeVille

1 Answer

My air condition is not blowing cold air


best diagnostic method is dual head gauges. balanced pressure between low and high side in the off position is aroung 90 lbs. running low pressure is 20-40 lbs and high pressure 160-200, is the compressior not coming on? does it stay on, or click on and off. either might mean the freon level is low. try unplugging the low pressure switch on the low side supply line and shorting the pigtail wires together with a paper clip. does the compressor stay on now? if so and the air is warm or cool, freon is low. if the air is cold that switch is bad. if compressor still won't come on the list of possibilities grows longer: compressor, comp fan clutch, AC relay, restriction at several places... repair shop time...

Sep 04, 2010 | 1991 Buick Riviera

1 Answer

What is the required high and low pressure for grand prix 1999. 3800 v6 -3.8L.


A/C pressures when running? Low side 35-45 High side 225-275

Aug 11, 2010 | 1999 Pontiac Grand Prix

2 Answers

Low pressure hose cooling system


on my 2000 expedition it is located on top of the compressor. The compressor is barrel shapped and silver and has a belt attached to it. There are 2 ports on the air compressor, one low and one high. When charging your air conditioner the gauge will only attach to the low pressure.

Jun 07, 2010 | 1999 Ford Expedition

1 Answer

Need to know if my 1993 ford club wagon is r-12 or r-134 is there any way to tell from fill ports? the r-134 CANISTERS FIT ON THE LOWSIDE, ARE THE R-12's a different size?


If it is a quick connect fitting, it is R-134a
The low(charge) side fitting is: 13mm
The high side fitting is: 16mm

If it is a threaded fitting with threads on the outside, then it is the older R-12 refrigerant and can only be serviced by a licensed air conditioning service.

The low(charge) side is 7/16" threads
The high side is 3/8" threads

When servicing your air conditioner it is best if you have gauges, but it can be done without, just be careful.

Assuming the air works, but just not putting out that much cool air, then 1 or 2 cans of refrigerant won't hurt.

If there is no pressure/refrigerant in the system at all then it is usually a sign of a leak and should be taken to a pro because you may need to replace the receiver/dryer and have the leak fixed. The system needs to be evacuated for maximum efficiency if there was a leak or if hte system has been opened.

Adding too much refrigerant can be catastrophic as the high side pressures can reach 200-300psi on a hot day. So if you happen to have a low side gauge, and it reads somewhere between 35-45 with the Ac operating, you are golden.(tire gauge won't work)

Don't be surprised if the compressor doesn't kick on right away. Some vehicles are equipped with a pressure switch to keep from damaging the compressor if it runs low. Usually after adding one can, it is enough to engage the compressor.

Hope this helps.

Mark

Aug 21, 2009 | 1993 Ford Econoline

1 Answer

The air conditioning in my 2008 Buick LaCrosse does not work.


Need clarification...
Does the compressor run steady, cycle on and off continually or even come on at all? If cycles on-off then attach charge manifold/gauge set and bring freon up to proper level. If does not come on at all, then start engine, turn a/c on, remove two-wire plug from low pressure cut-out switch mounted on accumulator. Jumper the wires at plug and see if compressor comes on. If so, bring freon up to proper level.

If charge level was low then check for system leak after system charge with an electronic leak detector if available.

If compressor runs but doesn't cool vehicle then with engine running and a/c on feel (carefully) the lines. High side line should be hot (be careful) and low side line should be cold. If these are both true then it's possible non-cooling condition is due to air temp diverter door not operating or heater valve not shutting off (if so equipped). If low side not cold it could be a plugged orifice tube. If high side not hot it could be bad rings on compressor. Both conditions can be diagnosed with a/c manifold gauge set by noting the pressures.

For safety... if not familiar with differences between hi and low side components or with charge equipment then please take vehicle to qualified person for service.

Jun 22, 2009 | 2001 GMC Yukon

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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