Kobalt 60 gallon air compressor. The step-by-step repair guide and video explain how to replace an air compressor pressure switch in less than 45 minutes. Air Compressor Troubleshooting The page contains the air compressor troubleshooting library, with links to all of the air compressor troubleshooting pages on this site. The photo above depicts one view of an air compressor pressure switch on a DIY type of air compressor. If you are not sure if your pressure switch is working, first thing to do is unplug the compressor, pull the cover, and then bleed all the air out of the compressor tank. Some air compressors are equipped with a pressure switch that has a ON / OFF switch as part of it, one of which, manfuactured by Lefoo, you can see below. This range is the difference of cut out and cut in pressure or the pressure band as I have said earlier. Excessive oil in compressor. If the safety valve is located before the oil separator, check differential pressure of oil separator. This gauge shows the pressure in the tank and also shows the cut out pressure level reached when the pressure switch shuts off the compressor, and the cut in pressure level when the switch starts the air compressor. In the photo the unloader valve is attached to the side of the compressor pressure switch. I sure hate it when a tool I have does not work properly or, sometimes doesn't even work at all. These tools are less expensive than their electrical counterparts, which makes the purchase of an air compressor an economical choice for anyone needing to use these types of tools on a regular basis. If you wish to be updated when new comments are posted, add: about-air-compressors.com/feed/ to your RSS reader. Wrong oil viscosity. If you wish to explore your compressor pressure switch, and I do recommend that you make yourself familiar with what is inside, make sure first that the compressor power supply is unplugged then go ahead, remove the cover. That lever moves up and down as the pressure switch trips on and off, and in so doing, operates the unloader valve actuator by depressing or releasing the pin, which can be seen protruding down from the bottom of the valve. Replace rings. The compressor check valve may be the issue. Compressor Leaks Air. If the pressure in the tank is higher than the cut in pressure of the switch, the switch will not trip. Safety valve blows / too high pressure. You will need to remove the cover of the switch, and use a multi-meter to check whether there is power on both sides of the switch. by rick (salisbury, ma. If you shut down the compressor when the tank is filled with air and then find that the pressure gauge is showing a drop in pressure, you know that the compressor is leaking air. I replaced my pressure switch on my compressor and it still isn’t shutting off all the way?I know the switch is good so why isn’t it separating the contacts all the way? Smaller air compressors may not have a visible pressure switch, and the pressure switch on your compressor may be visible, but be of a different shape, color etc. Are you having problems troubleshooting your compressor? More than 70 tools are offered by Campbell Hausfeld that can be used with an air compressor. As it reacts to the pressure change in a compressed air system, the pressure switch either allows or drops an outgoing signal that is used to initiate an action. Contact the air compressor repair manufacturer to buy a new assembly. Read about leaking unloader valves on the pressure switch and how to fix them on this site. The procedure can be different depending on your air compressor pressure switch type. Check inlet valve and loading solenoid for good operation. If you are searching for the phrases air compressor won’t turn on or air compressor won’t start; this post should help clarify why and offer solutions to get your air compressor working again.The reason your air compressor won’t turn on may be a number of different problems. In the image above we see a typical air compressor pressure switch, this one with an external unloader valve. Piston rings installed up-side down. Again, you do want to know what your present compressor pressure switch settings are. Oil in discharge air. Emglo air mate electric compressor will run but won’t build pressure above 20 psi. Check if pressure switch is correctly set and working. Air compressors have been widely used by all different types of industries in the world. The black box above contains the working components of the pressure switch, including the method of adjusting the cut in and cut out pressure levels of your air compressor. Drain down to full mark on sight gauge. Click here for information about a specific brand of compressor. This next photo shows the wiring of my compressor pressure switch, and also the sealant-smeared adjustment nuts. Mounting bolts loose. It will build pressure as it is suppose to but when it goes to shut off it starts shattering then shuts off. I expect that your switch will likely have this information under the lid too. 1. Click here to find the list of pages about general air compressor troubleshooting tips. My air compressor ran before but had leaks at the old pressure switch. Check viscosity. As the pressure drops it will reach and lower past the cut in pressure of that switch, and you should be able to see and hear the switch trip. 08 Jan. troubleshooting air compressor pressure switch. The handle at the bottom front of the pressure switch with the red knob on the end is the OFF / RUN switch on this unit. when it is below 30 degrees the compressor pumps only about 50 pounds . Feel around the motor parts for any sort of air draft. You will not normally need to try to adjust the pressure settings of your pressure switch. 1. If the pressure in the tank is below the normal cut in, then plug the compressor in, and use a multi-meter to check and see if voltage is flowing through the switch to the motor. Tighten. Replace the pressure switch. AIR COMPRESSOR TROUBLESHOOTING: SPECIAL NOTE ABOUT TROUBLESHOOTING-It is up to you to not only read all the information about your problem, ... not a bad pressure switch. Compressor air intake restricted. From workshops, garages, gas stations to basements and houses, air compressors are used in … This type of unloader valve is toggled by a lever that is protruding from the side of the switch. Refrigerant does not wear out or evaporate: only leaking air … The label under the lid on my pressure switch shows the electrical certifications, the manufacturer of this switch, and also some very important information for me if I have to replace the switch, and that is the cut in and cut out pressure levels for this switch. usa) I have an Emglo air mate electric that i haven’t used in about5 years, it will run and build up to about 20 psi and won’t build tank pressure any higher.It’s missing the air intake filter which i need to replace. Air Leaks From the Hood. Not shown on my photo, but also on a label under the cover, is an electrical schematic of the switch which you can refer to in the event you have pulled all the wires without marking them for re-wiring of the new switch. All Rights Reserved. First of all, disconnect your compressor from any kind of … troubleshooting air compressor pressure switch. Other types of pressure switches may have a toggle switch on one side of them. You’ve checked the power supply to the compressor pressure switch, across the pressure switch to the motor circuit, ... Click here to find the list of pages about general air compressor troubleshooting tips. 5. In the event your pressure switch or unloader valve is bleeding air constantly, the problem may not be either. 4. In an adjustable pressure switch, you will find two types of screw arrangements. Air Compressor Trouble Shooting Guide www.IndustrialAirCompressor.biz MCGUIRE AIR COMPRESSORS 1-888-229-9999 3 TROUBLE PROBABLE CAUSE CORRECTIVE ACTION Pressure Switch Defective 3 Moisture build up on the switch diaphragm Ruptured diaphragm (air … My Pressure Switch has my compressor ON OFF switch. There are many questions about the operation of a compressor pressure switch on the pages of this site. – December 2020, The compressor appears to compress the air but there no air at the hose on a 921.166460 – December 2020, Bambi 75/250 won’t build air after being on its side – November 2020, About Different Brands of Air Compressors, Want to bragg about your gorgeous computer rebuild? The air pressure is zero, the pressure switch is on and I read 120 volts where the line in connects but I read zero volts for the motor circuit. I have a ch oiless air compressor 5.5 hp 30 gallon tank. More than 16 years on line helping folks with their air compressor problems! Problems Occurring With Kobalt Air Compressors Kobalt Air Compressor Problems. On many air compressors the unloader valve is typically located on the side of the pressure switch and it is activated by by the cycling of pressure switch points as they open to stop power flow to the motor circuit, and close to resume power to the motor. If there is no pressure in the tank, the switch should have tripped to ON, and power should be flowing. As a result, there are a number of pages about compressor pressure switches, their problems, and the remedies. If the pressure in the tank is higher than the cut in pressure of the switch, the switch will not trip. When that doesn't happen—maybe the tank won't hold air, the pressure gauge isn't working or the safety valve keeps popping open—Sears PartsDirect has the troubleshooting guidance to get your air compressor back in good working condition. 1. Don’t turn any of the screws when there is zero pressure in the tank, or when your just get your new pressure switch out of the box. There must be hundreds of different types of air compressors that might be varied in sizes and capabilities but all of them have the same functional similarities that allow us to check the problems ourselves and solve rather than taking it to the shop and giving a crapload for petty problems. In the photo you can see the brass colored unloader valve on the side of the pressure switch. When the air in the compressor air tank reaches the cut out set point, and the pressure switch shuts the power supply to the motor off, at the same time, the pressure switch toggles the unloader valve to open dumping any trapped air. The power does not cross the switch … above 30 the compressor work s fine . The cut out and cut in pressures levels of this air compressor are satisfactory for my needs, else, I would have purchased a compressor with higher or lower pressures. I need a compressor pressure switch ass. The air compressor unloader valve is usually built into the pressure switch assembly. by Brad Beal (Lafayette, Louisiana) I have a 60 gallon Kobalt compressor about 4 years old. I tried to use a coupler but my compressor still won’t start. Or, remove the cover from the switch (unplug the compressor first) and locate the pressure switch part number. 2. If your air compressor won’t shut off after reaching full cut-out pressure or won’t start again after tank pressure drops, the pressure switch might be the problem. I have a compressor that I tried to use the Harbor Freight “automatic water drain” on and it required to cut the tubing on the pressure switch, well, it didn’t work so now I need to replace that tubing but I don’t know what type I need to buy or whete to buy it. You want to be sure the power is off as there are live power connections inside the lid. Air compressors like California Air Tools models start and stop continuously when their pressure differential gets to … This protects the compressor from damage. If it is not, then perhaps the pressure switch is pooched. ". In the case of our air compressor, the action is to turn on or turn off the electric motor of the air compressor. When it comes to one of my air compressors not working properly, then a whole bunch of my air tools cannot work properly either. The settings are properly set at the factory for the correct operation of your air compressor, and there is little to be gained by messing with them. Perhaps most important is to find the manual and determine the cut-in pressure range. And the second part states that “air compressor is … The unloader valve blows-off the exhaust pipe of the air compressor. Compressor troubleshooting – identifying problems and offering solutions – pages are listed below. 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