You could discover how well they maintained the system, how long they had it for and what issues they had, if any. Ideally, you’ll find a used air compressor that someone didn’t use often but maintained well.ĭepending on who you purchase used equipment from, you may receive information from the past owner. They might also come from businesses that have downsized their equipment needs. Used air compressors may come from companies that have decided to upgrade their system. The difference is simple - companies or individuals have previously employed used air compressors in their work, while new ones have never been used before. As a result, there’s quite the market for both new and used air compressors. Plenty of industries use air compressors for various work tasks. Used Air Compressorsīefore you even learn the difference between used and new air compressors, you may wonder if you can purchase used air compressors. When buying a new versus used air compressor, which one is best? We’ll outline the differences as well as the advantages and disadvantages below to help you make your choice. There are plenty of pros and cons for either type of air compressor, and you have many things to factor into your choice. If your tank pressure is zero PSI, then the pressure switch should have tripped to on, and power should be flowing across the switch to the motor side. If not, your pressure switch itself may have failed, assuming it tripped to on when the pressure in the tank fell below the normal cut-in pressure setting.When you need an air compressor for your operations, you have a choice to make - will you buy new or used? This comes after deciding the specific type of compressor you need, from rotary screw to reciprocating, so making another decision may be overwhelming. Is there power on the motor side of the switch? Using your multimeter or poke probe, you want to see if the power is flowing from the line side to the motor side, so you are going to test the motor side of the switch. You may see the terminals labeled as line (the power supply in from the plug), load (the power supply to the motor), the terminals might be marked as power supply, motor… a variety of labels if your compressor power switch has labels at all. Some compressor switches have these terminals labeled. Pressure switches often have terminals where the wires are attached. Typically the green wire is the ground wire.Īlso, typically, the black wires are hot in and the white wires are the hot return. Generally speaking (and this is anecdotal as I am not an electrician – don’t pretend to be – and do not dispense electrical advice) the wires of a 120-volt circuit are going to be white, black, and green. If your compressor is plugged into a wall socket, the screws (terminals) will be powered, and if you touch them and you are grounded, you might be electrocuted! If your compressor is a 220-volt compressor I recommend that you do not mess with this at all! You will see something along the lines of what the photo above shows you – a bunch of wires attached to screws. We need to try and find out if the pressure switch has tripped to the on position, and if power is flowing through it to the motor circuit.Ĭarefully remove the pressure switch cover. What Does the Compressor Start Capacitor Do?.What Else Stops an Air Compressor From Starting?.Remove the Air Compressors Pressure Switch Cover.Is Power Getting to the Air Compressor Motor?.Air Compressor Still Will Not Start – Secondary Troubleshooting Checks. What is the Air Pressure in Your Compressor Tank?.Air Compressor Will Not Start – Primary Troubleshooting Checks.Follow the guide below to figure out why an air compressor will not start. There are many types of air compressors in use around North America, and though many of them look different than other air compressors, and they certainly vary in size and other areas, there are similarities that will allow you to check and see why “an air compressor will not start, by yourself and hopefully not taking it to a shop which is both expensive and time-consuming. Hey! This site is reader-supported and we earn commissions if you purchase products from retailers after clicking on a link from our site.
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