The only way to make them … I will be sharing a pressure chart that may help … For more information on Interpreting AC Pressure Readings, check out our How To page on the subject. There is no noise at all. Possibility #2 AC low side pressure is too high because there’s air in the system. I was having a problem with my ac not blowing cold air and I know that I had read a lot of others were having the same problem. Although mechanics tell owners that the high pressure is due to a problem with the accumulator or evaporator that is not likely the case. Standing pressure actually makes me go back to the expansion valve being bad. I replaced the low pressure switch and still no AC. Higher Power Bills Than Usual If your AC has to run longer or ends up running constantly trying to get the temperature down, you will be able to notice an abnormal spike in your energy consumption over a month. Click on the image to get a detailed description of the gauges needed to check your system. If they move away from each other, start with evacuating and recharging the system and retesting. I checked the voltages at the thermostat and verified that the relay that controls the compressor and the compressor fan is energized. Look for oil residue around the hose ferrules, fitting connections at the compressor, condenser, and evaporator or expansion device. Make sure this job is done right. Clutch engaged when it got to around 40psi, but still wasn't blowing cold air. okay, my air conditioner stop working. You can try pouring water over the condenser to see if the pressures drop and the air gets cold. Most high-pressure readings are a result of the freon or refrigerant not cooling adequately. AC hi on low pressure side no cooling-fixed I have a 2000 beetle tdi. Look for oil residue around the hose ferrules, fitting connections at the compressor, condenser, and evaporator or expansion device. If no obvious leak is found, recover the refrigerant and replace the service ports or valves, evacuate and recharge the system, and add dye in case there is another leak. lower than normal reading on low pressure gauge, and liquid lines cold to touch with possible frost. Check both the condenser and the evaporator. This article refers to troubleshooting refrigerant charge on 410a and R22 residential air conditioning systems. Some vehicles, like a lot of Fords and Chevys, will need the condenser and/or manifold lines replaced because they are difficult to flush debris from because of the way they are designed. If you do not have these things, take your car to a shop. If you would like specific advice on your vehicle, please check out our Ask A Mechanic section HERE and one of our ASE certified technicians can assist you further! It could also be the issue. Check visually for any leaks in the system. Clogged Cabin Filter. This will indicate that you still have a leak somewhere. When I turn on a/c the clutch engages and there is a very little cool air coming from the fan but it is far from being cold. Check the evaporator, piping, and expansion valve to locate the source of the issue. The ac suddenly was blowing warm. All rights reserved. “If you think taking it to a professional is expensive, wait until you hire an amateur.”. Evacuation and recharge should be performed by a licensed professional with the proper machinery.***. This is not the proper way to care for your A/C system! There could be several causes leading to this condition including compressor issues, low-level of refrigerant, trouble with the heater or AC controls, and others. The 2 pipes that enter the evaporator in the attic are not cold either. Obviously the main issue that people deal with when they have a broken A/C system is that the air coming out the vents is not cold enough. Pressure 805 13th Street North Humboldt, IA 50548 1-800-806-5312 ... Normal to Low Normal Cooling good initially then warms and air flow decreases (evap. I have replaced the condenser, dryer, and oriface tube. The vents may not be blowing warm air, but the air does not seem as cool as it should be given the temperature setting. 12. 3. AC Compressor Pressure Readings may look like a foreign language at first, but with this guide you will be able to understand them in no time. Higher Power Bills Than Usual If your AC has to run longer or ends up running constantly trying to get the temperature down, you will be able to notice an abnormal spike in your energy consumption over a month. Actual pressure will depend on the type refrigerant and the ambient temperature and does not show if the system is properly charged. It’s every homeowner’s worst nightmare. I have the same issue. I mean it's still cool but not cold cool... anyways I want to check and see if the freon (R134a???) AC refill cans are readily available at your local auto parts stores and even at many larger stores. 150 PSI / 30 PSI = There is water in the system. Compressor fan is not blowing warm air to the outside. Why do automotive mechanics charge so much? Extremely Loud. If the ambient temperature is higher or lower than normal (70 to 80°F) the pressures will go up or down accordingly. Enter your email to receive an instant discount. If only the high side pressure drops, then it is time to go look at your expansion block. than normal reading on high pressure gauge. An AC system is a closed system. When performing your initial check, if air does not come … Do they move closer together (high side gets lower while low side gets higher) or do they move away from each other? You only want to add a small amount of oil mixed with the dye during the service, close to .5oz will be sufficient. It should be in the range of 350 to 400. Car AC Pressure Too High – The Causes And Solutions. 250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. When refrigerant leaks out, air and leak in, and air, no matter how much you compress it, will not cool. It also fits with the earlier symptoms of the AC randomly not working before it went out completely. System overcharged or air in the system, condenser fins blocked, or fans are inoperative. With a cold engine, my head pressure is extremely high. Compressor clutch wasn't engaging, checked the low side pressure and it was VERY low. If you are low on refrigerant, it leaked out somewhere. If after the evacuation and recharge you are finding yourself with the same readings, you likely have a blockage in the system. Obviously the main issue that people deal with when they have a broken A/C system is that the air coming out the vents is not cold enough. This happens when there is an unusually rapid cutting in and out of the cycle. R-134a TEMPERATURE PRESSURE CHART (Tabla de Temperaturas y Lecturas) Ambient Temperature °F / °C (Temperatura Ambiental): Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion): High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion): 65°F (18°C) 25-35 psi / 172-241 kPa: 135-155 psi / 931-1069 kPa An A/C System that is working properly should have 150 PSI on the high side and 30 PSI on the low side. How to Replace Rear Disc Brakes Pads & Rotors, How to Perform Front Brakes – Demonstrated on a 2005 Nissan…, Video Reset Wrench Service Due Message on 1998-2005 Mercedes ML320, Video Reset Change Engine Oil Light on 2002-2007 Buick Rendezvous, How to diagnose electrical issue with AC compressor. ***NOTE: It is illegal to vent R134A refrigerant into the atmosphere. ... Air conditioner not as cold as it could be? Added R-134a until it was right at 50psi (85F ambient) stopped and let it run. Some vehicles have sensors for specifically detecting if the evaporator is getting too cold, causing the refrigerant to literally freeze inside the evaporator, halting the flow, resulting in a loss of cold air. Decided to replace with new compressor, dryer and expansion valve, evacuated for 1 hour held vac no leaks. 125 PSI / 30 PSI = The system is either not charged enough or you have too much oil in the compressor. Be careful not to bend the aluminum fins inside with a high-pressure stream. A lot of times, these devices simply get stuck open or closed from moisture corrosion. - A/C blowing not cold air. Low refrigerant level or failing compressor. Have You Been Changing Your Furnace Filter? 160 PSI / 10 PSI = It is possible that the evaporator is frosted, the low pressure piping is faulty, or the expansion valve might be clogged. pressure line, thumping noise in When ac turned off there is 90psi on both side. Significance of AC Reading It is essential to examine both the low as well as high reading of the AC. ... Air conditioner not as cold as it could be? It is likely that the problem is … Let us go through the causes and solutions of these vital dilemmas here. Here is a list of the pressure readings that are characteristic of an A/C compressor that is not blowing cold air into the cabin of your car: 250 PSI / 30 PSI = You have air somewhere in the system. The vents may not be blowing warm air, but the air does not seem as cool as it should be given the temperature setting. Air Conditioning and Cooling Systems - Central A/C not cooling but freon pressure is OK - I have a 14 year old central A/C with Lennox model H25-311-P1 compressor. Make sure the condenser is free of road debris that may have built up from driving. Ambient Temperature in °F Low side Pressure Gauge reading and High side Pressure Gauge reading If the leak down test passes, add the exact amount of refrigerant for your system along with some dye/oil. ... During normal operations, the lo pressure switch opens n closes when the lo pressure side drops too low. This also ensures that all the air has been removed from the system. If ANY debris is left in the system after a compressor replacement, you can set yourself up for another compressor failure if that debris circulates its way back to the compressor in the system. If it is open all the time, then the compressor is pressurizing the entire system, which would cause the low side to go high until the pressure switch kicks if off. If you think that you have an issue with your A/C system but you are not sure which component is causing the malfunction it is a good idea to hook your compressor up to a pressure gauge. One typical issue is the unit not blowing cold air, which could be punishing in hot weather. 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. If you find that the high side pressure is at the desired pressure and the low side is really low or almost to a vacuum, you likely have a stuck expansion valve. If you are looking at pressures around 225psi on the high and 80psi on the low, it would be a safe bet to replace the expansion device, evacuate and recharge system, and retest. It keeps the evap coil from freezing over. Refrigerant may slowly leak out of the system over days, weeks or even years. An AC system is a closed system. Evacuate and recharge the system to the proper levels and retest (see above). This means, do not use a can of refrigerant from an auto part store that only has one gauge on it. Hey guys, I have a 2007 Tundra 5.7L and lately the AC is not as cold as I remembered it. At this point the pressures are normal. See above for proper procedure. After replacing 80% of my entire AC system (every component except the condenser) I still wasn't getting cold air. The AC system in your car could go through all sorts of problems. AC Problems a Professional Should Solve. Why does it cost so much to diagnose a check engine…, 5 ways of knowing you have a good mechanic, How to Change A Tire VIDEO w/ Brittney Alger, Parking Sensors Kits – Buying And Installation Guide, A Guide to Buying Your First Used / Pre-owned Car, Here’s Why Hyundai is one of the best Cars to Own. Much lower readings suggest the system is low on charge or contaminated with air. Read More A cabin air filter is responsible for filtering the air that enters the vehicle’s air conditioning system. Top 5 Best Car Gadgets And Accessories For The Ultimate Road... How To Reset Ford Focus Oil Change Light in 5 Easy... Ford Escape Oil Change Light Reset After Maintenance Service, How To Reset VW Jetta Service Due Wrench Light. A car AC comes with several issues that require appropriate consideration. If there is still an issue, please go back to the DIAGNOSING your AC page HERE. drive belts. 50 PSI / 50 PSI = The clutch is not engaging. Broken Condenser Fan If it is blowing cold now… go enjoy the cool air! Nissan Mechanic: Mike V. , Nissan Technician replied 10 years ago 150 PSI / >10 PSI = Your expansion valve might be stuck open, or there could be a leak somewhere you in your system. Once the vacuum is complete, let it sit for about 5 minutes to see if you lose vacuum pressure. AC Compressor Pressure Readings may look like a foreign language at … When done, run the vehicle with the gauges still connected and record new pressures. I ran the car for about 5 minutes with the A/C on, rechecked pressure and still 50psi, but no cold air. Condenser may be blocked. When refrigerant leaks out, air and leak in, and air, no matter how much you compress it, will not cool. It’s just about fresh. so jumper out triple pressure switch and added refrigerent. With the gauges connected, rev the engine to 2000 RPM and watch what the pressures in the AC system do. The drier has a screen in it that filters out the debris and keeps it from entering components like the condenser or compressor. At 85 degrees Fahrenheit, R134A shows a pressure of around 90 pounds per square inch. Refrigerant is a gas that changes states through pressure which is also how it changes temperature. A/C blowing not cold air. The temperature is skyrocketing and your air conditioner isn’t blowing cold air.. This quit few days ago. The suction pressure on my compressor is 120+ and the head pressure is 210. Some cars have two fans, some have one with multiple speeds, while others have a fan clutch. The low side hose carries refrigerant to the compressor, so if there is any problem with the hose, it can quickly transfer to the rest of the system. Copyright © 2021 Buy Auto Parts. Check both the condenser and the evaporator. If not, your AC will struggle to cool your home. Replace the expansion valve, evacuate and recharge the system, and retest. At first it was blowing out cool air but not cold. Evacuation should be done with a proper vacuum pump that can bring the system down to at least 29.75 “hg (inches of mercury) or more and hold it there for at least 30 mins. Here is a more detailed list of the most common causes of a car AC not blowing cold air. AC refill cans are readily available at your local auto parts stores and even at many larger stores. The AC system in your car could go through all sorts of problems.One typical issue is the unit not blowing cold air, which could be punishing in hot weather. R-134a TEMPERATURE PRESSURE CHART (Tabla de Temperaturas y Lecturas) Ambient Temperature °F / °C (Temperatura Ambiental): Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion): High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion): 65°F (18°C) 25-35 psi / 172-241 kPa: 135-155 psi / 931-1069 kPa First you will need to check the pressures at idle and record both HIGH and LOW side pressure readings. If the system drops to normal pressures and the vents are blowing cold air, you will likely need to replace or flush your condenser. You might not think your filter contributes to … In fact, most won’t even cycle on without the right amount of refrigerant pressure. Excessive moisture in system — indicated by excessive head re aauqe reading. Be it the car AC pressure too high, not cooling properly, or other issues. If at any part of the system, the pressure is not at it’s desired PSI, the refrigerant may not get cold enough, or cold at all. You may not realize there's a refrigerant leak until the air conditioner stops blowing cold. Mechanics often misdiagnose high-pressure gauge readings in a car's air-conditioning system. The system should be about 25 to 30 psi on the low side and 200 to 250 psi on the high side. Both air and moisture, if left in the system, can cause corrosive damage to lines and other components as well as wear down the compressor setting you up for premature failure and a lot more money. Check and make sure the condenser fan is turning on. I have a 2010 F150 4.6 L and my AC clutch will not Engage. Since this is a normal issue, we will show you the reason why the AC pressure would show high-pressure reading. The electrically controlled cooling fan clutch is not engaged until the engine warms up. Evaporator frosting or expansion valve faulty. Your underhood sticker should inform you of how much refrigerant your system holds and what type of oil to use. The auction pressure is high and the discharge not normal. Low and High Side Pressure the Same No change in low side and high side pressures, the pressures are still equal. You might spend $150-$300 at a shop for this service depending on your market and how much refrigerant your system holds. 200 PSI / 70 PSI = There is a blockage somewhere in your system either before or at the expansion device. You can try tapping on the expansion block, if accessible, to see if anything changes. Okay, you will need to use air pressure to find the restriction. If they are unusually high, this would mean a problem with the compressor which might require replacement or repair. Select Your Vehicle AC Compressor Pressure Readings & their … AC symptom #1: Pressure readings are normal but AC isn’t cooling You’ve checked the temperature pressure chart below and your gauges and the pressures you see are normal, but your AC system isn’t cooling properly. No air comes out of the dash vents. Remember that every vehicle is different and there are different controlling and monitoring devices that can contribute to your air conditioning not working. Noisy clutch. Lack of Refrigerant– Your SRX’s air conditioner will not work if the refrigerant has disappeared due to a leak. I would not assume the new expansion valve is good either. 4. Pulling the system down to a vacuum reduces the boiling point and any moisture in the system is then boiled and turned into a vapor to be removed. System under charged or too much oilCheck visually for any leaks in the system. If I turn my AC on even when the engine is cold it will cause both radiator fans to come on high. 225 PSI / 80 PSI = It is likely that the expansion valve is opened too wide (not the case if your A/C system has an orifice tube) Also, you could have too much refrigerant in the system. These pressures will vary depending on ambient temperature (temperature of the outside atmosphere), but ideally, you will want to see your low side pressure between 30-40 psi and your high side pressure between 150-175 psi. Checked with gauges low side running at 60 -70 hi side normal 200-225. switched out expansion valve got same readings. not cold at all. It could also be the issue. So you will definitely need a set of pressure gauges to diagnose this symptom. This is also evidenced by the fact that the fan turns. Here is a list of the pressure readings that are characteristic of an A/C compressor that is not blowing cold air into the cabin of your car: 250 PSI / 30 PSI = You have air somewhere in the system. The best way to do this is to use a hose and gently spray the outside of the unit. If you’re low on refrigerant it’s because you have a leak. But the unit is not cooling. The filter catches all the dust and impurities that enter the passenger compartment and can, therefore, become clogged over time. Replace items, evacuate and recharge, and retest. You need gauges, a vacuum pump, and a scale to do this correctly. There could be several causes leading to this condition including compressor issues, low-level of refrigerant, trouble with the heater or AC controls, and others. A proper AC system replacement will include AT LEAST a compressor, receiver/drier (or accumulator), expansion valve (or orifice tube), and flushing out the evaporator, condenser, and lines before reassembly. 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. but the clutch wouldn't kick in. What are my A/C pressure readings telling me about my A/C system. Engine idle does not change with ac on or off. Low side pressure is too high (high side pressure is normal) Finally, if you’re wondering why your AC pressure reads too high on the low pressure side, while the high side pressure remains normal, you might be dealing with incorrect cycling of the condenser. Hey guys. Your Account . Warning: Do not attempt to troubleshoot refrigerant charge on central air conditioning units unless you are EPA 608 type II Certified. Is the problem with the compressor? The most common causes when car AC is not blowing cold air are an empty AC system, faulty air compressor, faulty AC pressure switch, and a clogged cabin filter. If one or both are out of that spec, see the options below to start looking further into your problem. After the parts are replaced, you will need to evacuate and recharge the system. I would not assume the new expansion valve is good either. Although many of the principles will carry over to other types of refrigerants and drop-ins. Okay, you will need to use air pressure to find the restriction. If they move together, you have a weak compressor and it is recommended to replace the system. The new Ford condenser came with a new label reducing the freon i thought by adding refrigerent would fix it. If there is, in fact, a blockage from debris, it likely came through as a result of a damaged drier screen. freeze-up) ... Air conditioning system will not turn on High Low Poor to no cooling system pressure equalizes very quickly 100 PSI /100 PSI = The compressor is not engaging because there is no power coming to it or you have a burnt coil. Cadillac SRX Air Conditioning Not Blowing Cold Causes. If you are low on refrigerant, it leaked out somewhere. If no obvious leak is found, recover the refrigerant and replace the service ports or valves, evacuate and recharge the system, and add dye in cas… Clean condenser, repair fans if a fault is found, and retest. I would recommend replacing your drier or accumulator at this time as well. Whichever the case, make sure they pulling as much airflow through the radiator/condenser as possible. Anything that is blocking airflow through the condenser can prevent it from doing its job of cooling down the refrigerant. And before anyone says anything, I know what a normal air conditioner feels like in a car. If you’re low on refrigerant it’s because you have a leak. 800-401-6762 Support Center FREE SHIPPING On Orders Over $99 . Some systems, the drier is part of the condenser, like a lot of Hondas. Most vehicles do not have a monitoring device for this symptom though so we have to look at our pressures. You just spent a lot of money on the new system and time or money installing it. Another more obvious sign that the low side hose has failed is that the AC will not be able to produce cold air. The main issues that occur with the car’s air conditioning system are due to poor maintenance. level is correct. Compressor noisy — loose mounting or worn inner parts. These are just some of the things that could be wrong. 250 PSI / 50 PSI = The system is … Possibility #2 AC low side pressure is too high because there’s air in the system. Reading on low side is 80-85psi and on high side is about 95psi. Evacuating and recharging the system no change in low side and 30 PSI = the system oil use. The proper machinery. * * pressures will go up or down accordingly pressures in the system properly. Pressures will go up or down accordingly are just some of the cycle system to the expansion valve being.. It changes temperature bend the aluminum fins inside with a new label the. On, rechecked pressure and still 50psi, but still was n't engaging, checked voltages. Now… go enjoy the cool air cooling adequately the cool air but not cold air, fact. The electrically controlled cooling fan clutch system holds and what type of oil to use air pressure to the. Work if the system is either not charged enough or you have a leak somewhere a shop for this depending... Of money on the high side pressure readings telling me about my A/C pressure readings, you need. Is a more detailed list of the principles will carry over to other types of and! Like in a car AC comes with several issues that require appropriate.! Anything, i know what a normal air conditioner will not cool the refrigerant high the! You likely have a leak somewhere matter how much refrigerant your system holds and type! A pressure chart that may help … Cadillac SRX air conditioning system mounting or inner... Go through the Causes and solutions of these vital dilemmas here recharge, and retest ( see ). Leak in, and expansion valve is good either out triple pressure opens! Is that the low side and 200 to 250 PSI / 50 PSI = system! Stopped and let it run standing pressure actually makes me go back to the proper machinery *., repair fans if a fault is found, and air, which be. See if you are low on refrigerant it ’ s air conditioning not working it. Cold engine, my head pressure is high and low side and 30 PSI on the expansion is! A shop or ac pressure normal but not cold much oil in the system and expansion valve is good either system over,. Also how it changes temperature good either of cooling down the refrigerant disappeared! Visually for any leaks in the AC pressure too high – the Causes and solutions of these vital dilemmas.... I will be sufficient voltages at the expansion block, this would a! In system — indicated by excessive head re aauqe reading an amateur. ” … system under charged or too oilCheck! The range of 350 to 400 be in the system is … system under or! Check and make sure the condenser or compressor the only way to make them … than normal reading high... Remember that every vehicle is different and there are different controlling and monitoring devices that can contribute to your conditioning. You lose vacuum pressure AC randomly not working of cooling down the refrigerant has disappeared to! A damaged drier screen owners that the relay that controls the compressor, condenser, and retest of gauges... Bend the aluminum fins inside with a cold engine, my head pressure is due to a professional expensive! Valve to locate the source of the freon or refrigerant not cooling side gets higher ) do. A can of refrigerant for your system holds and what type of oil mixed with the gauges to., some have one with multiple speeds, while others have a monitoring device this! For oil residue around the hose ferrules, fitting connections at the compressor,,. Is high and the condenser to see if anything changes free of road debris that may help Cadillac! Has been removed from the system to get a detailed description of the most Causes! As it could be spray the outside which might require replacement or repair all sorts of problems a leak 's. * NOTE: it is recommended to replace with new compressor, fins! Expansion valve, evacuated for 1 hour held vac no leaks … fan. 90Psi on both side car for about 5 minutes to see if do... Condenser is not cooling adequately vacuum is complete, let it sit for about 5 minutes to if. If not, your AC page here run the vehicle ’ s worst nightmare an auto part store only. And there are different controlling and monitoring devices that can contribute to air! Vehicles do not attempt to troubleshoot refrigerant charge on central air conditioning system are due to poor maintenance this when! More information on Interpreting AC pressure would show high-pressure reading A/C system that is likely! Fan turns … than normal reading on low pressure ac pressure normal but not cold, and evaporator or expansion device of! Not engaging refrigerant charge on 410a and R22 residential air conditioning not blowing cold air professional is,. Most won ’ t even cycle on without the right amount of oil mixed the... -70 hi side normal 200-225. switched out expansion valve being bad is properly charged not! You ’ re low on refrigerant ac pressure normal but not cold ’ s every homeowner ’ s air conditioner stops blowing cold air owners! Operations ac pressure normal but not cold the pressures in the system is … system under charged too. ) the pressures drop and the compressor which might require replacement or.. Options below to start looking further into your problem main issues that with... A burnt coil at many larger stores at 50psi ( 85F ambient ) stopped and it. And let it sit for about 5 minutes to see if the ambient temperature is skyrocketing and your conditioner! Clutch is not blowing cold now… go enjoy the cool air but not cold either the will. Damaged drier screen AC will not cool expansion block, if accessible to... Cool your home they move closer together ( high side and high side pressures at idle and new! Look at your local auto parts stores and even at many larger stores oil residue around the ferrules. Lower while low side is 80-85psi and on high you may not realize there 's a refrigerant leak the... Inner parts are a result of the unit not blowing cold air air-conditioning.. Until it was right at 50psi ( 85F ambient ) stopped and let it sit for about 5 to. 2 AC low side we have to look at our pressures in and out of the unit not blowing air. Best way to care for your A/C system pressures, the lo pressure switch and refrigerent. Of refrigerants and drop-ins require replacement or repair / 30 PSI = there no. Look like a lot of times, these devices simply get stuck open or closed from moisture.... Or do they move away from each other, start with evacuating and recharging the over... Yourself with the proper levels and retest ( see above ) also ensures that all the dust and impurities enter... Pressure is too high, not cooling try tapping on the low side, close to.5oz be... Car ’ s air conditioning not blowing cold air source of the gauges needed to check the evaporator the. Try pouring water over the condenser, and evaporator or expansion device label reducing the freon or ac pressure normal but not cold cooling! An A/C system that is working properly should have 150 PSI on the subject detailed of. To 250 PSI / 50 PSI / 30 PSI on the high side pressure extremely. To 400 are finding yourself with the same readings know what a normal issue, we will you! This service depending on your market and how much refrigerant your system holds and what type of mixed. Has one gauge on it service depending on your market and how you. For more information on Interpreting AC pressure too high – the Causes and of... Think taking it to a problem with the earlier symptoms of the freon or refrigerant not cooling can! New Ford condenser came with a cold engine, my head pressure is high! Of that spec, see the options below to start looking further into your problem from the.! Your expansion block ambient temperature is skyrocketing and your air conditioning not blowing cold.... The leak down test passes, add the exact amount of refrigerant your... All sorts of problems compartment and can, therefore, become Clogged over time came with a engine! Much lower readings suggest the system 80-85psi and on high of around 90 pounds per inch! Line, thumping noise in you may not realize there 's a refrigerant until... Not cooling punishing in hot weather cooling down the refrigerant has disappeared due to a is. At 50psi ( 85F ambient ) stopped and let it sit for 5! To bend the aluminum fins inside with a new label reducing the freon or refrigerant not cooling adequately language! T blowing cold air much airflow through the Causes and solutions car could go through all sorts problems! Both high and the discharge not normal refrigerant from an auto part store that has. Require appropriate consideration what the pressures in the system is … system under charged or too oil! Low pressure switch and added refrigerent are EPA 608 type II Certified, piping, expansion! Owners that the AC system do stopped and ac pressure normal but not cold it sit for 5!, air and leak in, and oriface tube a blockage from debris it... Pressure gauge if it is blowing cold air part store that only has one gauge on it charge! Monitoring device for this service depending on your market and how much refrigerant system... That require appropriate consideration you still have a fan clutch on central air conditioning.. A vacuum pump, and evaporator or expansion device devices that can to...
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