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The best way for you to tell if you have a problem with the low side being too high in your air conditioner and the high side being too low is by the pressure gauge that we linked to above. An A/C System that is working properly should have 150 PSI on the high side and 30 PSI on the low side. Evacuate the system and recharge with the correct amount of refrigerant. High Pressure Side Too Low. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. That's about average for the low pressure and will only change a little bit based on the ambient temperature around your engine compartment. Fix: Evacuate and check for debris on orifice tube screen or debris in the expansion valve. If you turn your car on and turn the AC to high and check the AC pressure lines, the low pressure side should read around 30 psi and the high pressure side should read around 250psi. 2. A high low side reading (with usual high side reading) is often the result of a malfunction in the thermostat switch. The temperature that your air conditioning is able to produce is directly related to the pressure in the overall system. Engine Problems Chevy Equinox: Will You Stand Excessive Oil Consumption and Complete Engine Failure? All Rights Reserved. Low and High Side Pressure the Same No change in low side and high side pressures, the pressures are still equal. 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. If you have too much water in your system, and the receiver / drier is overloaded then it will not be able to continue doing what it's supposed to do. There are a few too many variables for this one to just be handled on your own, or for the reason for this problem to be refined down more than what we've said. Getting your air conditioner serviced, especially if you need to drain the refrigerant and put new stuff in, is something that has to be done using the exact right tools by a professional. Therefore, you should get this part replaced or checked by an experienced mechanic. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Engine coolant levels will be low. Let’s Find Out The Pros and Cons Of Each! This can essentially destroy your entire air conditioning unit. To know for sure that this is the problem you do need to test it when the engine isn't running as pressure goes higher when you do have the engine on, as they're supposed to. Second symptom: Auto Repairs Are EXPENSIVE Engine Replacement: $1300+ Transmission: $1000+ Air Conditioner: $750+. That's the result of either too much refrigerant being put into the system or too much oil. : It's possible that you have debris blocking the airflow that's coming from your condenser fan motor, or it's possible the motor of the. And for a lot of drivers this is something they may let slide for a while since air conditioning is not required for the proper functioning of a vehicle. The pressure is going to need to be released somehow, and it's best to leave that to a mechanic to get the job done safely and properly. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. Replace expansion valve, flush and install in-line filter. The pressure on the low side reads 35 PSI while the high side reads 275 PSI! Fix: Remove excess refrigerant or evacuate and recharge with the correct amount. Is It Cheaper To Rebuild An Engine Or Replace It? If you're finding that the low side pressure is higher than it should be while the high side pressure is about normal, then you're probably having an issue with your condenser. Recharge. Clogged condenser fins or an inoperative condenser fan can cause low side pressure to be too high. Determining the pressure in your AC system is not entirely difficult to do. Low side pressure at 50-55psi could be low charge, overcharge, bad compressor, weak compressor, low air flow over condenser, stuck open expansion valve, or many other things. The car will not turn the AC compressor on, probably because these pressure are out of wack. 2) Low refrigerant charge (most common cause). Although there are a number of reasons that can make your low side pressure go too high, and the high side pressure go too low, when it comes to both of them happening at the same time you have some limited options. 1. And for a lot of drivers this is something they may let slide for a while since air conditioning is not required for the proper functioning of a vehicle. If the expansion valve fails then the coolant levels can be thrown off. Traction Control Switch Replacement Cost – This Quick Fix Is Less Than $100! Once you know that your pressure is off and that's the reason your air conditioning is not working the way it's supposed to, then you should hopefully be able to troubleshoot one of the causes that we've gone through which led to this pressure imbalance in the first place. If you use your gauge and determine that your low side is up over 100 and your high side is down around 150 then odds are a mechanic is going to tell you that the problem you're dealing with is your compressor has failed. The air conditioning system in any car is one of the most finicky systems that you have. If you need to dig into your doors, dash or console, Alldatadiy.com is the better choice because Eautorepair.net doesn’t any interior or exterior trim or body part removal. If it's not the compressor that's causing trouble for your AC pressure, it may be your pressure switch. Anyway, I hooked up my manifold gauges and the low side pressure maxed out the gauge! If the ambient temperature is higher or lower than normal (70 to 80°F) the pressures will go up or down accordingly. Almost sounds like your thermal expansion valve is not opening completely. A new compressor may cost you a couple hundred dollars to buy and get repaired. From that point all you need to do is compare it to the ambient temperature and the pressure is listed on the number chart for your particular air conditioning unit. Most common cause ) them that warns you not to eat them this would be a number Problems., flush and install in-line filter and evaporator or expansion valve is located the. 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