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High temp discharge air

My diesel powdered 100 cfm compressor shuts down after about ten minutes of running with or without any equipment hook up to it, the high temp discharge light comes on and the engine will shut down. I could be a sensor or maybe not, any suggestion where to start looking for the problem. i just purchased it . thanks mike

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  • 37 Answers

Try unhooking the sensor at the pump and sticking a paper clip into the plug terminals and see if it shuts down. If it doesn't then you have a bad sensor or it is overheating. Make sure it has plenty of oil in the system. Also check the scavenger line coming off of the air/oil separator to make sure it isn't plugged up.

Posted on Feb 20, 2014

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Posted on Jan 02, 2017

compman66
  • 169 Answers

SOURCE: 1989 Ingersoll Rand 185 diesel compressor shuts down under load

most have safety shut downs built in, on the compressor side you will have a high discharge temp shut down, usually set to shut down @ 230 degrees F. normal temp should be @ 180F if it is running hot first check oil level on the compressor, and that the radiator is clean. some machines will have a thermostat that will only allow oil flow to go to the radiator after it comes up to about 150 degrees F. you really need to have a manual on the machine to see what other safety's it may have on the compressor and engine side as well.

Posted on Jan 09, 2010

Testimonial: "Thank you very much for responding. It was a little low on coolant. The comp. oil level was fine. I changed the fuel filter and the prob is gone"

  • 89 Answers

SOURCE: 1989 Ingersoll-Rand 185 cfm air compressor will not build up air

ITS A POSSIBILITY AND YOU BETTER HOPE ITS NOT SPINNING BECAUSE THE SCREW COMPRESSOR IS LOCKED UP. CHECK THE OIL LEVEL IN THE SUMP AND SEE IF THE ROTOR WILL TURN WHEN NOT RUNNING. TYPICALLY THE DIESEL ENGINE WILL TURN HIGHER RPMS WHEN IT HAS NO DRAG ( NO COMPRESSOR HOOKED UP ). YOU CAN GET THE PARTS FROM INGERSOL RAND OR ANY RENTAL YARD - UNITED, PENSKE, SUNBELT, ETC. THEIR MECHANIC SHOPS ARE USUALLY FOR HIRE AND CAN EVEN INSTALL IT FOR A CHARGE. ALSO MAKE SURE NOTHING BUILT A NEST IN THERE. IF YOU REMOVE THE SCREW, MAKE SURE AND WATCH FOR SHIMS. THOSE SHAFTS NEED TO LINED UP PERFECT TO REDUCE VIBRATION. GOOD LUCK

Posted on Apr 07, 2009

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I just bought a craftsman pneumatic 1/2-in drive impact wrench. And used it with my craftsman 4-gallon 1hp air compressor tried to loosen the bolts on my car wheel wouldn't loosen them help


Pneumatic tools are rated in cfm (cubic feet per minute). Your 1 HP air compressor is rated at probably not more than 3 cfm while the 1/2 " impact driver needs at least 8 cfm, maybe 12 chm of air.
The compressor must provide more chm than tool rating needs.
It is a problem, by the time you look at five horse power air compressors and larger, a lot of electric power is needed. A circuit of 220 volts, 20, 30, or more amps would be required to run those large expensive compressors.
If you can, return the air tool and get a good electric tool instead.
Leave those high air volume air tools to shops that are so equipped to use, or invest if you must.

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1 Answer

What cuases high a/e discharge fault on ingersol rand air compressor


Dirty coolers are always associated with high discharge temps,always make sure your coolers are clean
compressor oil filters being clogged can also raise your temp n cause the unit to over heat,and on the much bigger machines if the compressor oil pump fails then you will have severe over heating as the oil flow to the cooler is assisted by the pump!!things like regulating pressure should always be adjusted to the machines specs so it doesn't over pressurize n put load on your airend while the engine is at idle.

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probably a bad discharge temp sensor or a bad thermo valve which is really a thermostat you need to take the temperature of the running unit when it is running best way is to use a inferred temp gun at the discharge of the pump or watch you temp guage if it jumps around or is erratic the sensor is bad .compressor usually will shut off on high temp at 230f

Mar 11, 2014 | Air Tools & Compressors

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I have a ssr ep 100 and the intellisys says no control power ive tryed to clear it but it wont


Probably have a bad High air temp. switch located in the end of the compressor air end. It has control power run thru the switch. If the switch opens on temp or just goes bad you lose control power which will come up on screen as control power loss. Replace HAT switch.

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1. Check your oil level, top up, or totally replace it

2. Check your cooler (Radiator looking thing) blow it out with a blow gun

3. Check your thermo valve (may need replacing)

4. Is the room that your compressor is in very warm, ambient air is a big factor in the running of your compressor

5. Do you have all the panels fitted to the machine? These are needed to aid airflow past your air-end

These are the main causes of high air end temperature. It may just need a good service

Hope this helps

Aug 29, 2012 | Ingersoll Rand Rotary Screw Compressor ...

1 Answer

Poor air compression


I would guess from the info supplied that the pressure switch is shutting it down at 125. Most piston type compressor only pump a max. of 175 unless it is a special high pressure unit. Also it may be shutting down on high amps, high temp etc.However with all that said Piston units are positive displacement, meanning that it should pump until something gives. Start your unit, close the discharge air valve and see what it pumps up to. May have to adjust pressure switch to get over 125. If unit runs and runs and just will not go over 125, you probably have a valve going bad. Do you have a safety lifting. if so another indication of a bad valve.

Nov 27, 2011 | Ingersoll Air Tools & Compressors

1 Answer

After running for a few hours it gets hot and shuts down but runs fine every morning


Without more info I will have to give you several things to look at. Typically during the hot months rotary units experience temperature shut downs due to the following. Dirty oil coolers. Blowing them out with air my help some but ideally they need to be washed using a degreaser solution. Location. during the hot months poor air flow/ air removal may let heat from the compressor build up in or under the cover or room. This hot air gets drawn in by the compressor and raises the compressor temperature. The cycle continues until the compressor shuts down on high air temp. Maintenance. Poor maintenance on rotary screw compressors leads to shut downs on high temp, high air temps then play havoc on dryers which causes moisture in the air system. Maintenance items that need replacing regularly ( about 2000 hrs) oil filter, air filter, Depending on type of oil used change 2000 to 8000 hrs, seperator @ 8000 hrs. Also the amont element will cause high temps if bad. It is located where the three oil lines come together. There should be 4 screws that hold the cover on. the cover also has a hose connected to it and located close to the oil cooler. This amont element acts like the thermostat in your car. it lets oil bypass the oil cooler or causes more oil to go thru the cooler. the cooler oil and bypass oil mixes and maintains a certain temp. air end temp should run about 195 F and injected temp about 165 F. hope this helps. if you can give more detailed info I can get you closer to your problem.

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I have a 7-41 I.R. compressor. Recently serviced with 1200 hrs done. It now only runs for about 20 mins before shutting down. After 15 mins she starts again. I have tried bypassing water temp sender and...


make sure the cooler(s) are clean. Next check the airend discharge temperature switch commonly called a HAT (High Air Temp) switch. These switches will reset as the compressor cools down. I would be able to access the switch quickly. Run unit until shutdown remove wires and see if switch is open. if open you found your problem

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2 Answers

1989 Ingersoll Rand 185 diesel compressor shuts down under load


most have safety shut downs built in, on the compressor side you will have a high discharge temp shut down, usually set to shut down @ 230 degrees F. normal temp should be @ 180F if it is running hot first check oil level on the compressor, and that the radiator is clean. some machines will have a thermostat that will only allow oil flow to go to the radiator after it comes up to about 150 degrees F. you really need to have a manual on the machine to see what other safety's it may have on the compressor and engine side as well.

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