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the PSI is much higher or lower

If the PSI is much higher or lower than this, it may indicate a problem within the system. When AC is overcharged, it leads to high pressure and temperature within the system. Compressors cycle also to be able to prevent your vehicles internal pressure from going above some maximum pressures found in the system. Now high side is only 70psi. If your condenser fan functions at very high pressure, it can damage the aluminum, then you begin to experience leakage from the evaporator coil. I USED MY MEAT THERMOMETER PROBE TO TEST IT. Would this extra oil cause this issue? We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. Thanks for your question about your 2014 Nissan Altima. She blows cold,air just wondering how hot is the high pressure line supposed to get ..can it be there is air in the system .. This will result in leakage between these parts that leads to destruction at some point. A condenser is designed to eliminate the heat and reduce the temperature of the freon or refrigerant. Its also very possible that the condenser fans motor is faulty.

The orifice in the valve could be stuck and not adjusting to evaporator temperature. It seems like youve pinpointed to the problem to that pressure sensor that is keeping your compressor from turning on. If the system is overcharged frequently without enough room to depressurize, your AC system will stop functioning altogether. Well, swapped out the G65 switch and the FCM and still nothing. To get your system operating at top efficiency you need to first evacuate the system, then add the refrigerant. If you are certain theres something wrong with your car ac pressure when off; a better decision is to get your car to a professional like us and get your car fixed rightly. To make sure you get as much refrigerant out of the can and into your system, you connect it to the lower pressure side of the system so it is the low side pressure that you see measured on the gauge on your refill can. Thx. document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Stay in touch with new products, promotions, free stuff and more! Now for the flushing process, you just have to spray your ac flushing compound into the pipes. Could it be a faulty gauge. air compressor ac clutch conditioners understanding honda problems troubleshoot saturn late operation civic bhp team kaput goes spinning engine attachment You would need 26 ounces of PAG 150 for your Chevrolet Camaro 6 cylinder. The low side pressure in your air conditioning system should drop down significantly when your engine is running and your AC compressor is cycling on. AC magnetic clutch fuse is OK. Pressure on high side 970kPa. If the compressor is short-cycling, its possible the system is overcharged, but this would usually result in the compressor cycling very rapidly. Thank you for asking about your Nissan Altima. For a better experience, please enable JavaScript in your browser before proceeding. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicles condition and be able to make any appropriate recommendations. Your cars AC might be suffering from poor maintenance also; you have to check your AC system for issues properly. Added appropriate amount of PAG oil, pulled vaccum, and charged 134a. Evaporator lines connecting to valve one line is cool, other room temp inside cabin. The sticker is almost always correct but to be absolutely sure you can try calling your local Ford dealership and giving the service department your VIN and asking them to look up the amount and type of AC oil that your system requires. Oh its a 2006 Ford expedition. troublecodes Its remotely possible the valve is bad in your AC system so when you try to add refrigerant it closes off but thats very unlikely. Thanks for your question about your Ford Fusion. Based on your description, it sounds like even before you evacuated some of the refrigerant, both the low side and high side psi are out of range. I just checked pressure in my altimas ac system after starting it and it is showing 25psi. In fact, as soon as you turn your car AC off, you will notice that there are now two sources of airflow into and out of your cars cabin: direct outside air from the windows and airflow from outside through vents on the engine compartment. But leaving your ac system to deteriorate isnt such a good idea; its always best to tackle the problems whenever they surface. Volvo S40 1.8 2006. Everything is cooling however at idle Im seeing my pressure climb sky high before the fan clutch engages. Any chance you could tell me which one I need for my application, what should pressure be 66 gto r6 comp. You can use an ac pressure chart to know if you have a good reading. Thanks again for your question about your F150. You wouldnt want to override this as it is a safety feature for your air conditioning system. This is responsible for measuring the pressure and telling the clutch to engage or disengage. Outside temperature about 18 degeee celsius. I put 11 oz of oil and 58 oz of freon in it I ran my truck for awhile air blows cold but my high side pressure got to 450 low side was around 60. link to How to Clean Car AC Evaporator without Removing It? To check for a clog you would need to check the system high pressure when it was blowing cold air as well as when it wasnt working. Just replaced fan clutch, compressor, accumulator, and orifice. You might try calling Ford to find out what the pressures in your system should be just to make sure they are higher than normal. Besides, it can be frustrating driving on a sunny day, and you cannot use your air conditioner. Most problems with your air conditioning system will require a vacuum, repair, and refill of the system. Currently my 2011 Kia Sportage (2.4) is blowing cool but not cold air. Maybe compressor clutch dissengage? I have a 95 F150. My goal is to always learn new skills and share my experience with the world. My AC problem had resolved for few days after I had topped it up, but now it starts blowing hot air after I have drive the car for few minutes. Thank you for asking about your Chevy Silverado. The condenser is a vital component in an air conditioner. But the highest temperature, it runs out fifty-seven pounds. It is completely normal for your vehicles compressor cycle to on and off. It is 70 degrees here in Texas and my AC pressure long my vehicle is running low side is 39 PSI and high side is 190 PSI. Knowing what the pressures are in the air conditioning system in your car can tell you almost all you need to know about how your system is functioning. The condenser of an air conditioner is mainly for absorbing high pressure and temperature from your compressor. if partial repair, new compressor was to be drained and contents removed to mimic to old one. So I added 140cc of oil to new compressor #2, and installed. Why Is My Dashboard Air Vents Not Working. AutoZone also helps test your vehicles parts for free, e.g., your alternator, battery, voltage, and starter. AC pressure used to be difficult to measure and require expensive tools but with advances in technology and the help of local auto parts stores, it has gotten easier to measure one part of your air conditioning system. My mystery is as follows: My AC cools off ice cold while it is 80F or below but it blows not hot air but neutral air when its over 90F. If the ambient air temperature is 70, Shut the unit off to check the charge. This process can either be done online or by visiting close by shops. Recently I fill the refrigerant 2 weeks ago and that time cooling was great. When the compressor is off, its normal for low side pressures to be 25-40 psi, and high side pressure can get up to 200+psi. If you look up some pressure charts for R-134a, it sounds like your low side and high side pressure is a little high. The other thing we would recommend checking the wiring between the sensor and the HVAC module to see if there is anything that could be disturbing the signal which could cause the erratic or inaccurate readings. The ACP Pressure sensor varies, sometimes it show 12 psi, 0 psi, i think right now its showing about 50 psi and wont let the compressor kick on until it shows around 70 I think. Can You Run Led Strip Lights Off A Car Battery? And even if theres no sign of trouble now, wait until later. Unless it was extremely warm outside, those pressures do sound to be a bit high. Most new vehicles have electric fans in addition to the engine driven fan that come on when the compressor is cycling. On the high-pressure side of the system, a low pressure can also indicate that youve got a low refrigerant level or if the pressure is close to the same as it is on the low-pressure side it can confirm youre having compressor issues. Read through scantool. The best way to measure the high-pressure side of your system is to get the proper tools for a local auto parts store. HAVE YOU ANY LUCK WITH FIXING YOURS? -BD Auto Pro, I replaced my account compressor , acculalator and expansion valve, the oil chart said I needed 14 oz of oil and 58 oz of freon. However, the compressor is not cycling on and off, all it does is spinning. What should car AC pressure be with the engine off? But when this becomes too frequent, it may be due to an improper charge (for example, being low on Freon). Car is blowing cool not cold air. I have a 2007 Kia Sportage that blows warm air when at a stop light or drive through. It may not make sense but when the outside temp i high 35 Celsius it blows cold air.

So far example when the truck is warming up and the fan clutch is not engaged (several minutes), if I turn the AC the High side climbs to approx 350-400 (high side pressure sensor turns off compressor after 430 I believe), and the low side can get up to approx 60 70. Thanks, Brandon. I replaced the switch with 2 different ones and its still doing the same thing. The refrigerant pressure for R134A is determined at any temperature found between -22-2020 Fahrenheit read from a valid pressure temperature chart. I assumed the gauge may be a faulty one so I put all the freon in. AC refill cans are readily available at your local auto parts stores and even at many larger stores. I followed directions to the letter and ran on max, compressor on, engine to normal temp, I checked the pressure was on the low side at 30 lb. Problem: 2001 BMW 330xi. Slowly can in the system contaminate evacuate the system whole vacuum with the motor stopped put some free on in it bleed the line put some free on in it start the motor feel it 27 on the low takes a long time to fill it up dont be in a hurry short bursts turn you can sideways and Shake and little bit once in awhile will make it fil faster got air which is water it is a contaminate it has to be a vacuum pulled on it when the motor is stopped believe the line then you put a little bit in it before you start the truck then you can continue filling your vehicle Slow leak is causing the contaminant. It could be that your system is low on refrigerant since both the high and low side pressures are low. The fan motor has been replaced with two electric fans. We use cookies to enhance your experience. Flushed system, new compressor,drier,xvalve, evacuated to 200 microns, charged, same problem. The problem is at idle the discharge temp is 58 degrees at 75 degrees outside air temp. Wait about 20 mins and flush the compound out with a shop air; a shop compressor is preferable.

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the PSI is much higher or lower