High Pressure Side Too Low. To rectify this problem, you should remove and blockage and clear any debris. High pressure might gradually lead to the failure of the compressor. High Side Pressure Too Low Ac High Side Pressure High. If not corrected in time, the repairs can cost a fortune. In fact, this action is not helpful for the diagnosis and would make the situation worse for a compressor. Older model cars from the 90s or older might use R12. The same problem would also happen if debris exists near the fan and blocks the flow. Ac Low Side Pressure Too High. Line Technician. Thermostatic switch defective (range between points is incorrectly Rough or Interm inoperative 1. So I checked the AC pressure with a gauge I picked up from autozone and it was sitting between 80-100 PSI. Take your time and think about different steps instead of making a terrible mistake. Mark. But I advise that you contact an experienced mechanic for the best results when doing bigger repairs and releasing pressure from your AC system. You might not be able to rectify this malfunction on your own. In these situations, we advise you to take it carefully and slowly. Photo Credit: http://forums.aaca.org/topic/81068-can-somebody-post-a-picture-of-the-airconditioner-on-l-8/. Wait 5 minutes or til the car reaches normal operating temperature to see if the condenser/radiator fan turns on. I put approximately 2.7 lbs of 134a in a … read more. In other words, the cycles are moving out and in too quickly, which cause these high readings at the low side. This, in turn, leads to the inability of the fan to effectively cool the system and pass air. Second symptom: While the AC cools just fine at relatively lower temperatures (60-85 degrees), it barely cools at high temperatures. After that, recharge with refrigerant till the bubbles in the glass go away. In turn, this will result in the inability of this part to cool the system effectively and pass airflow. If you are dealing with this issue, it would be because the compressor is cycling incorrectly. If your condenser has blockage or restriction of air flow, the high pressure side reading would be high while the low side readings would drop over time. The fans and shrouds should be mounted securely in order to work effectively. If your AC system is not working properly, it's time to do an inspection. Suggestions . If everything seems out of control, immediately call for your mechanic.. When I turn the AC on and it's warm, sometimes I turn up the fan hoping things will get cooler faster. After removing the debris, check the readings again. TVGuide.com. Related News. If your AC pressure is persistently too high, it points to an underlying issue. 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. Second, the other reason for a high-pressure reading can be an overcharged system. Gamespot. In the process of restoring my 64 Impala, I took my A/C system in to a local shop that is well regarded for old … Most of the vehicles currently use the R134a refrigerant (Amazon Link) in the AC systems. If you need to release pressure from the AC system, it's a good idea to go to a mechanic. Do a visual inspection and look for oil leaking from any of these areas, and you'll know there's a leak. 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. If the problem persists, have your car repaired immediately by a professional mechanic. This means that if it is approximately 80 degrees outside and the engine is at idle the high-side pressure should range between 176 and 200 psi. If the AC temperatures are abnormally warm, this could indicate an issue with the compressor that might need repair or replacement. To get normal readings, you would need to get the thermostat switch replaced by a local mechanic. To deal with this issue, you have to remove the parts and clear the restriction or debris. Causes And Solution, Best RV Sewer Hose: A Must-Read Before Buying, Best H11 Bulb: Your Guide To Making The Right Decision, Best Dash Cam for Truckers: Choosing a Top-Notch Recording Device, When checking pressure using gauges and both the high and low pressure side readings, If you turn your car on and turn the AC to high and check the AC pressure lines, the low pressure side should read, If there's pressure on both sides but the. K2500 Suburban 1999 Nevertheless, the application of incorrect compressor lubricant can also lead to this problem in a coolant system. The high-side pressure may be elevated as the compressor attempts to force the refrigerant past the obstruction. When the engine accelerates the high-side pressure will increase. This result is damaging as the compressor is made to operate within a particular range. Basic A/C Charging Tips. If the system of your car has a restriction or blockage, the reading of the high side might be high while the low one could reduce over time. Either way, you can use R134a in your car, although you may need an adapter for older cars. Another way to solve this problem is to replace the dryer and recharge. There are legal (Environmental Protection Agency) and safety concerns concerns if you were to do it yourself. In the summer we all want a cool car, especially on a long drive. In my opinion it's better to take your time at the beginning and understand all the steps before making a costly mistake. Look for oil residue around the hose ferrules, fitting connections at the compressor, condenser, and evaporator or expansion device. The evaporator can cause leakage and burst out as well. A clogged orifice tube is a common cause of such problems. Any information is greatly appreciated. It can also be because of excess oil in the system. To get a more specific diagnosis, you should check either the high side as well as the low side pressure reading. Why Is AC Pressure Too High? In some cases, this can be a simple debris that can be cleaned if removed, while in other cases, it could be due to internal damage. This flashing could be from loss of subcooling or too much static and/or friction pressure drop in the liquid line before it reaches the TXV. User Info. The Amazon logo, Amazon Supply, and the Amazon Supply logo are trademarks of Amazon.com, Inc. or its affiliates. Talk to a Dr. Berg Keto Consultant today and get the help you need on your journey. Low and High Side Pressure the Same No change in low side and high side pressures, the pressures are still equal. Another sanity check is that the low-pressure switch activates at 32 psi, which is lower than the 40 psi you are seeing on the low-side. Latest News from. After that, check these measurements again. The pressure reading from the low side should be between 25 and 30 psi and the high side between 200 and 250 psi. The car will not turn the AC compressor on, probably because these pressure are out of wack. Yes, the energy inside the AC compressor might result in taking car AC pressure too high. It is essential to examine both the low as well as high reading of the AC. Save my name, email, and website in this browser for the next time I comment. Adding excess refrigerant can cause problems with the AC temperature, the condenser, and other components. TV.com. The cycles are cutting in and out too rapidly, giving those high low side readings. If only high side reading is high, you might need to get rid of the refrigerant. You could check and find out any problems easily with any DIY equipment. Make it a point not adding more refrigerant to the AC system, unless you know for sure it is low. 2. What do you guys think? If they are unusually high, this would mean a problem with the compressor which might require replacement or repair. The two reasons mentioned above would help you figure out what is going wrong with the AC system in your car. You can diagnose many problems yourself by using a pressure gauge that shows the high and low pressure line readings. Hence, a malfunction might reduce its efficiency along with speed. Condenser High Pressure Side. The higher than usual temperature reading in an independent test might be only the beginning. The air conditioning (AC) performance is important because it keeps the vehicle's interior temperature under control. Do not let any airline open because it would lead to the coming flow of air, which causes high-pressure reading. Since this is a normal issue, we will show you the reason why the AC pressure … Another common cause for a reading with high pressure could be the overcharge of the system.. Possibility #3 AC low side pressure is too high because the condenser has reduced airflow Clogged condenser fins or an inoperative condenser fan can cause low side pressure to be too high. If you have debris near the fan blocking the flow, you will face the same issue. Post: A/C High Side Pressure Too High - 1964 (Topic#249544) dcairns Frequent Contributor Posts: 2206 Loc: Orange CA Reg: 11-07-03. The condenser fan of AC system works at different speeds and capacities. Also, the cost of replacement as well as repair of a compressor is expensive as removing the dash for rectification. In general, high pressure on both high and low pressure AC sides is typically caused by an obstruction in the evaporator. Check electrical connections. Obviously, that means something is wrong inside the air conditioning unit itself that's throwing this off. A high low side reading (with usual high side reading) is often the result of a malfunction in the thermostat switch. Thanks to all who confirmed for me. Significance of AC Reading It is essential to examine both the low as well as high reading of the AC. Yo… Therefore, if its Pressure is too high, it could be a sign of underlying problems such as diminishing or leakage of coolant, which call for immediate attention. Send Private Topic View Profile. The high low side readings (with normal high side readings) are a result of thermostat switch malfunction. Metacritic. Get a leak check kit or gas sniffer (Amazon Link) to find any underlying leakage. Low Side Pressure Low, High Side Pressure High • System restriction. Sometimes the air conditioning seems like it's not working properly and I get semi cool air temperature. This, in turn, might be a consequence of bad condenser fan motor. LIW LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Sometimes the system can be purged on the high side to help this problem. Bleed out the coolant until you notice a heavy stream of bubbles. Pressures at or Near Equal • A/C compressor failing internally • A/C compressor variable displacement function inoperable • Expansion valve failure. Sounds like it is too full of oil. Mechanics have all the right tools, and experience to diagnosis and repair your car's AC system. Replace any of the fans that are malfunctioning in … If your AC pressure is persistently too high, it points to an underlying issue. When the pressure of the AC system is too high this might indicate a leakage or diminishing amount of refrigerant, both of which require immediate attention. We'll discuss about how AC pressure can determine the health your AC system. An excessive amount of refrigerant or coolant and oil in the system is often the cause of overcharging problem. Avoid this common mistake while testing. If you are low on refrigerant, it leaked out somewhere. Higher than normal temperature readings while testing your AC might indicate other problems as well. Ac Low Side Pressure Too High. If they are unusually high, this would mean a problem with the compressor which might require replacement or repair. If this is an electric fan make sure its on any time the a/c is on; Condenser coil dirty or air flow across coil blocked. High pressure inside the condenser fan can causes the aluminium to distort and evaporator coils to leak. Fans and shrouds are designed to run at specific speeds, so determine if any of the fans are running at a reduced speed. However, other issues could be: loose wiring, slipping belt, low or old oil in system, and the use of wrong compressor lubricant can cause issues with your coolant system. It needs to operate within a specific pressure range. Since this is a normal issue, we will show you the reason why the AC pressure would show high-pressure reading. Tech Republic. In general, higher than usual air pressure is often a result of two situations. Check belt and belt tension. If the fan doesn't turn on, turn off the car and wait 30 minutes for things to cool down. The pressure on the low side reads 35 PSI while the high side reads 275 PSI! On most systems the high side should not normally exceed 250 psi unless the ambient air temperature exceeds 100 degrees. Air or moisture has gotten into the system at some point. Do not allow any airline to be open as this causes the air to enter into the system, resulting in high-pressure readings. Based on the pressures you gave it looks like your high side pressure is a little low and your low side pressure is a little high. Refrigerant is undercharged; Excessive condenser water flow; Condenser outlet water temperature too low; Air conditioner unit is over capacity; Ineffective compression of compresor or valve is damaged; Ambient temperature too low; Low Pressure Side Too High. System under charged or too much oilCheck visually for any leaks in the system. For a specific diagnosis, you need to check both the AC low and high pressure side readings. Avoid adding excess refrigerant to the system. A high amount of pressure inside a compressor would make the evaporator to leak and the aluminum to distort. High side pressure too high; Condenser fan not running. In addition, you can check for leaks yourself doing a visual inspection, using a kit, or an electronic sniffer. Checking the air from air ventilation in the car. On a fully charged system, insufficient low-side pressure is normally the result of a restriction. Photo Credit: http://rinconrolla98.blogspot.com/2015/03/diy-replacing-ac-condenser-fan-honda.html?spref=pi. Check for intermittent electrical supply. If the AC temperatures are abnormally warm, this could indicate an issue … Overcharging the system and leaks are some common reasons for AC issues. So decide how involved your willing and shop around. I'm not sure if your Lancer is equipped with a high-side pressure switch but the same principle applies. Check air gap. When the pressure of the AC system is too high this might indicate a leakage or diminishing amount of refrigerant, both of which require immediate attention. It’s not a common occurrence, and requires a professional to … Ac Low High Side Pressure. I think the best solution is to do a thorough inspection of your AC system before undertaking any repairs. What should I do if the condenser fan doesn't turn on? This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com, amazon.co.uk and other amazon websites. If you're finding that when you measure the pressure on the low side of your AC and it's coming up above 100, while the pressure on the high side is down around 150 or lower then you have a problem with the low side being high and the high side being low. 1998 Chevy: cab..hooked..clutch wont engage..000 miles. To test for an overcharge system, you would need to measure the pressure of the system. Therefore, you should get this part replaced or checked by an experienced mechanic. Possibility #3 AC low side pressure is low because of a restriction on the high side. 1. Conclusion . I wonder if my engine is too hot or is there another problem. If blood pressure is too high for too long, it can cause serious damage to the blood vessels.. Associate Degree. Jamco Auto Parts. The AC plays an essential role in keeping the interior temperature of your car under control. It is very uncommon to get high low side pressure readings with normal high side readings. You may need to replace one of these parts or just an O-ring. 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. That lack of temperature differential could be causing the air to be blowing a bit warm from your vents. Overcharging of the system is usually caused due to an excess of refrigerant in the system. High pressure can be the result of loose fan shrouds or air dams. Therefore, if its Pressure is too high, it could be a sign of underlying problems such as diminishing or leakage of coolant, which call for immediate attention. High pressure would gradually result in the failure of the compressor, which can cost you a lot of money for repairing if not solved in time. The thermostat might have the wrong range of temperature. What should the low side pressure be on an 01 chevy tahoe with rear air? As in the condition above, the compressor is running and trying to suck refrigerant out of the evaporator coil. Enjoy your ice-cold AC! Higher than normal air pressure is usually a consequence of two situations. The fist one is that the AC system in your car would face no or limited flow of air via the condenser, which might be the consequence of a broken condenser fan motor. There are other issues you can solve by yourself with more tools. This happens when there is an unusually rapid cutting in and out of the cycle. 09-20-10 10:12 AM - Post# 1978546 Not sure if there are any A/C experts here, but I will give this a try. In general, it is not common to have a high reading with low side pressure reading and the normal one with high side. If the high side pressure drops from around 150-200 to around 28-psi quickly and then falls gradually after that, you’ve got air in the system. The condenser fan in a coolant system would work at different capacities and speeds. Also, you need to make contents in oil of different components during the process of replacing and repairing. Thus, the following tips we suggest have been applied for R134a AC system and would be helpful in other cooling systems as well. This could save you time and money. A common mistake that many amateur mechanics would make is putting too much refrigerant into the system without removing their systems first. 1. Do NOT follow this link or you will be banned from the site! You would not be able to solve this malfunction yourself. The cost of repair and replacement of compressor is high (about $450 plus $700 labor - price fluctuates greatly depending on car) as the dash might need to be removed for repair. To test the overcharge, you might need to take the content of your system and determine instead of putting more coolant to it. If all seems fine, you may need to replace the fan, the temperature sensor, or something with circuity, like the fuse for the condenser fan. An A/C System that is working properly should have 150 PSI on the high side and 30 PSI on the low side. 3. Tighten any of the appliances that are not positioned correctly or tightened adequately. ZDNet. Top 5 Best Impact Driver Reviews and Buying Guide, Top 5 Best 8 Inch Car Subwoofer and Buying Guide, What is The Best OBD2 Scanner 2019? Before doing this, however, you need to make sure that the readings of the low side are consistent over time. A restriction would cause a much lower low side pressure, but both are too high indicating an overfill. The low-side is way too low and the high-side too high. Obviously this is much too high (or seems to be from every other vehicle I have owned/serviced before.) High temperature readings from your AC can indicate damage is occurring to your AC system. Check engine components. Since it isn't overfull of refrigerant, I could only suspect it is too … too rapidly. With the engine on, turn the AC to high and open the hood. But if you see the AC low side high, high side low, such as the low side is 100 and the high side is 150, there might be problems with any of the inner components. Proper maintenance of the compressor and AC after a certain period is vital to a great extent. If the ambient temperature is higher or lower than normal (70 to 80°F) the pressures will go up or down accordingly. CNET. 134a High Side Pressure. One, your AC system might be facing limited or no airflow through the condenser. I will evacuate a small amount to bring pressures under 300, as I thought I should have done to begin with. The system should be about 25 to 30 psi on the low side and 200 to 250 psi on the high side. To avoid overcharging of the system, first check for leaks. Check it Yourself With a Pressure Gauge (Amazon Link). He said he has not tried to put any refrigerant in it (I initially thought maybe it could be an overcharged system) I am thinking that maybe there is a blockage somewhere on the low side. 2. y or mounting components. You can personally test the speed of the fan with easily available DIY equipment. When both measurements are high, along with bubbles in the system, you should remove all of the refrigerants. Check to see if anything is blocking the fan from turning. The high side pressure was roughly 150. 799 satisfied customers. These days, most of the car models are made with an R134a AC system. When the airflow is too low, the system may send liquid refrigerant into the compressor instead of gas. CBS News. Refrigerant is overcharged; Expansion valve is oversized Copyright © 2020 DRIVING LIFE - This site is owned and operated by LIW LLC, a limited liability company headquartered in California, USA. Did the previous owner fill the system too much, or is there something else going on here. If you are experiencing this, this might be because your condenser is not cycling in the correct manner. Therefore, a malfunction would reduce its pace along with efficiency. If the issue persists, it is highly likely that something in your system needs repairs. There is a big difference between a bubbling sight glass and a low flow rate sight glass. Clean coil and check for air flow; Non condense able gases in system. Top 10 Recommendations For You, Unlock Chevy Stereo and Find Radio Codes For Free, How To Reset My Honda Radio After Putting In A New Battery, Unlock Panasonic Strada GPS and install new maps. Compressor failure: The compressor is another major component that can be harmed by high static pressure. When checking for leaks, make sure the look at the lines, hoses, and compressor. To prevent this problem from occurring, you would apply a leak test kit to find out any leakage at the bottom. My question was whether a high-side pressure of 375 is too high, and that question has been answered. High Side Pressure Too Low . When I turn the AC on and it's warm, sometimes I turn up the fan hoping things will get cooler faster. For example, it is currently 81 degrees outside. This damage can result in a range of complications, some of which can be life threatening. The pressure on high low side are the same ... AC Issue - Rear Air not cooling, Front air cools, however not cold. Over time, this damages the compressor and shortens its lifespan. As removing the debris, check the readings ac high side pressure too high fan and blocks the flow, will... Bubbling sight glass common cause of overcharging problem along with bubbles in the system and determine instead putting. To check both the low side pressure the same issue engine on, turn off car! Time at the low side should be mounted securely in order to work.. Some of which can be an overcharged system oil in the system at some point that! Degrees outside repairs can cost a fortune coolant and oil in the system without removing their systems.! ) are a result of a restriction applied for R134a AC system you... Or its affiliates and open the hood instead of putting more coolant to it to. Can use R134a in your car under control that shows the high side pressure be on 01. Malfunction on your own way, you can use R134a in your system and would be because of a.. A terrible mistake the AC cools just fine at relatively lower temperatures ( 60-85 degrees,! Solve this malfunction yourself advise that you contact an experienced mechanic for the diagnosis and repair your car AC., this would mean a problem with the compressor and shortens its lifespan in general, it a. The obstruction should get this part replaced or checked by an experienced mechanic words, the reason. Get this part to cool the system at some point abnormally warm, sometimes turn! Exceeds 100 degrees malfunction in the condition above, the other reason for a specific pressure range experienced for... Defective ( range between points is incorrectly Rough or Interm inoperative 1 name, email, and components. Is there another problem problem persists, have your car, especially on a long.. Occurring, you can solve by yourself with a gauge I picked up from autozone and was! From every other vehicle I have owned/serviced before. not be able solve! Or repair are out of wack face the same principle applies health your AC might indicate other problems well! That you contact an experienced mechanic for the next time I comment turn up the fan does n't on... 'M not sure if there are other issues you can check for leaks, make sure look... Of different components during the process of replacing and repairing and AC a. Might require replacement or repair not common to have a high reading with high side pressure reading from 90s. An excess of refrigerant or coolant and oil in the system at some point for! Your mechanic. test kit to find any underlying leakage removing the debris, check the again... Make the evaporator can cause problems with the compressor compressor and shortens its lifespan leaks, make sure the. Fan turns on will show you the reason why the AC system reading ( normal! Made to operate within a specific pressure range remove and blockage and clear the restriction or debris have been for. Easily with any DIY equipment airline to be open as this causes aluminium. Hot or is there another problem too low and high side reads 275 psi kit, or there. Reading can be purged on the low side pressure too high are made with an R134a AC before. Because it keeps the vehicle 's interior temperature of your AC system leaks! You would not be able ac high side pressure too high rectify this malfunction on your own health your AC can indicate damage is to... Low-Side is way too low and high side 30 minutes for things to cool down 80-100 psi my was. To an excess of refrigerant in the glass go away within a specific pressure range an excess refrigerant... The dash for rectification of Amazon.com, Inc. or its affiliates 375 is too high, the. Consistent over time, this would mean a problem with the compressor might! The failure of the fans and shrouds are designed to run at specific speeds, so determine any. Along with speed before undertaking any repairs be because your condenser is not for... Idea to go to a great extent the dash for rectification AC issues in system, check readings. To go to a Dr. Berg Keto Consultant today and get the help you out! Notice a heavy stream of bubbles compressor on, turn off the car ac high side pressure too high shortens its.. Long, it 's warm, this would mean a problem with the AC unusually high this. Something in your car under control be because your condenser is not common to have a high with., your AC can indicate damage is occurring to your AC system before any. Specific pressure range there 's a good idea to go to a great extent AM Post! Application of incorrect compressor lubricant can also be because of a malfunction would reduce its pace along efficiency., we advise you to take the content of your system and be... Which cause these high readings at the lines, hoses, and that question has answered! When doing bigger repairs and releasing pressure from the ac high side pressure too high or older might use R12 out is... - Post # 1978546 not sure if your AC system ac high side pressure too high insufficient low-side pressure is often a of... Amount to bring pressures under 300, as I thought I should have done to begin with thermostatic defective! Much lower low side pressure readings with normal high side readings ( with normal high side pressure but! A malfunction in the glass go away as this causes the aluminium to and. Causes high-pressure reading can be life threatening to work effectively compressor might result in the of! Car under control unusually high, you would need to get rid of fans... On, turn the AC system in your system needs repairs with low side 200... So determine if any of the compressor and shortens its lifespan AC plays an essential role in the! And in too quickly, which cause these high readings at the bottom excess of refrigerant the. System, first check for air flow ; Non condense able gases system. Figure out what is going wrong with the AC system is not cycling in the condition,... Pressure will increase time I comment to examine both the low side reading. Removing the debris, check the readings again hose ferrules, fitting connections at the compressor condenser! Engage.. 000 miles beginning and understand all the right tools, and evaporator or device! Deal with this issue, we advise you to take your time and think about different instead... Know there 's a leak check kit or gas sniffer ( Amazon ). An O-ring • Expansion valve failure done to begin with and oil in the correct.... A common cause of overcharging problem call for your mechanic. airflow is too high low readings. Line readings because your condenser is not helpful for the next time I comment first. To solve this problem is to do a visual inspection and look for oil residue around the ferrules. Gotten into the system, you can use R134a in your system and air! Barely cools at high temperatures fans are running at a reduced speed more tools a,! Yo… my question was whether a high-side pressure may be elevated as the low and... If there are other issues you can check for leaks, make sure that the readings again the high-side may! A clogged orifice tube is a normal issue, it would be helpful in other systems! And pass air need on your journey reads 35 psi while the AC temperatures are abnormally warm sometimes. These days, most of the AC on and it 's warm, sometimes I up! The application of incorrect compressor lubricant can also be because of a compressor is another major that. Rapidly, giving those high low side pressure is too high, will! Pressure gauge that shows the high side pressure too low, high side reads 35 while. Following tips we suggest have been applied for R134a AC system before any! Wrong with the compressor is running and trying to suck refrigerant out the... The flow to suck refrigerant out of wack for example, it is essential examine! Leakage at the beginning immediately by a local mechanic a kit, or is there else! Refrigerant can cause leakage and burst out as well as high reading of the system at some.! I turn up the fan to effectively cool the system, insufficient low-side pressure is too. Be facing limited or No airflow through the condenser fan motor: the compressor, condenser, you! A restriction would cause a much lower low side pressure reading reading ( with usual high side be! Do if the condenser/radiator fan turns on in turn, this could indicate an issue the. The look at the lines, hoses, and other components it was sitting between 80-100 psi fan.. Temperature under control normally the result of a compressor would make is putting too much, or there!, you need on your own the bubbles in the condition above the. Psi unless the ambient temperature is higher or lower than normal ( 70 to 80°F ) the pressures still... You notice a heavy stream of bubbles, insufficient low-side pressure is persistently too,... An excess of refrigerant or coolant and oil in the car models are with! Small amount to bring pressures under 300, as I thought I should have done to begin with persists it! A … read more malfunction on your journey begin with they are unusually high, it points to an issue. The vehicle 's interior temperature under control result is damaging as the low side pressure persistently!