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Air compressor should compressor pull full load amps all the time

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Usually, motor will draw lower amperage when tank is empty then draw most when about full. High amp draw is caused by long cord, weak capacitor, leaking check valve or blown head gasket/s. If gaskets are bad, the head of the compressor will be very hot and take much longer to fill. If the motor (is too small) is not correctly matched to the pump, the motor will draw max amps. To correct motor to small, use a smaller pulley at the motor. Using a smaller pulley will turn the pump less rpm giving the motor a break lowering amp draw. Good luck

Posted on Mar 24, 2014


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Posted on Jan 02, 2017


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Compressor builds to 100 lb pressure. after a few minutes use, it comes on again to begin pressure build up. next cycle, it trips circuit breaker in house.

You didn't provide all pertinent info available to you. Lets take what we have; and, consider why your compressor is overloading the circuit breaker. Points to ponder:

  1. Not knowing the exact model (not series) I don't know what the amperage pull is for your "extreme" compressor or the circuit breaker's rating. A 25 amp compressor connected to a 25 amp breaker could be an issue. Campbell Hausfeld's support pages are crashing so I can't check the possabilites.

  2. Are you using a lightweight extension cord? The lower the rating of an extension cord the higher the amp pull on the breaker. If you eliminate the extension cord does the problem go away? Ohm's Law applies. <>

  3. What else is on this breaker? Is there other high-amp equipment in another room (water cooler, window air-conditioner, portable electric heater, etc.) pulling from this same circuit breaker.

  4. Is the circuit breaker not performing to specification? I've seen failing breakers trip early.

    First, check the owner's manual for power requirements. Next step, use no extension cord; and, insure nothing else is pulling power on that breaker. Then, use a different breaker and see if the problem follows the compressor. If all else checks out than I'd consider binding in the compressor causing the amp pull to be too high.

    Good Luck!

Mar 29, 2015 | Campbell Hausfeld Extreme Contractor...

1 Answer

QGS-50 compressor runs fine for a couple hours then trips the breaker it runs about 180-200 deg allready replaced thermostat and cleaned coolers also when it reaches full pressure and unloads it doesnt...

Check the size of the breaker in your electric panel, then check the motor name plate on compressor. Make sure you know what voltage you have to determine switch amp draw that your motor will be pulling. Once you have the amp draw multiply that # by 1.75. That is the smallest breaker that you can use. If you take the same amp draw and multiply by 2.25 that is the largest breaker that you use. Somewhere between those two numbers there is a breaker out there for you, unless your panel is to small.

May 27, 2014 | Quincy Compressor 1624221408...

1 Answer

Have a SSR-EP100 air compressor that shows

Try to reset the main motor and fan motor over loads by pushing the reset on the overload it self, Then reset the controller. If the error resets, before starting. put a clamp on amp meter on to L1 or L3 motor lead which is located in the compressor electrical box . Then start and observe amps when unit is making air fully loaded. Once you know how many amps at full load the unit is pulling ,look at the overload setting on main motor overload and see if it is approxmately 10 amps above the max amps being pulled.If not set it about 10 amps above your max load amps.

Nov 26, 2011 | Ingersoll Rand Air Tools & Compressors

1 Answer

Air compressor only builds air pressure up to about 80 psi ,then trips the breaker.

Hi hotrailron...

....Check and clean your Air Filter replace if necessary
....Sounds like you may have a weak breaker,motor or compressor problems
....Electrical...make sure you are getting the full either 110v or 220v depending on what your compressor motor requires.
.....Use an Clip over type AMP Gauge to test the amp loading when the motor is running at amost 0 pressure until it gets to the 80psi when it trips the breaker. You want the highest reading.
If it is over the amount of the breaker then you may have to get a larger breaker in amps or you may have motor or compressor problems.
.....Motor... check the plate on the motor to see what the amps should be and compare them against what you got from checking the wires with the clip on amp meter.
.... Compressor...check the compressor to see if it turns easy without any tight spots that might cause the amp meter to read high.
Please take time to rate me thumbs up

Sep 13, 2011 | Garden

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I have a new ingersol rand 80 gal 7.5hp air compressor 230volt single phase and was wondering what size breaker it needs to be put on

Your owners manual spec sheet should give you that answer. However since that unit at max loads should pull 32 to 35 amps I recommend 1.5 times max amps. So approximately a 50 amp breaker. This all based on standard wire size and length of wire run. Also when checking your voltage at load you should be showing 235 to 240 volts.

Jan 09, 2011 | Ingersoll Rand - Rand Type - 30...

2 Answers


We need to try to find the problem by doing a little trouble shooting. First check the amp rateing on the motor name plate. Next check the amp setting on the motor overload. It should be set no more than 10% above the motor rating. While checking the overload setting check all of the starter and overload lugs/screws to make sure they are tight.Next lets check the amps on the the motor using an amp meter with the motor running and compressor fully loaded. Amps at full load should be within 10% of name plate rating. If Amps are high Check incoming voltage. If all of the above checks out you may have something internally happening in the airend.

Nov 15, 2010 | ACCO Brands Air Tools & Compressors

1 Answer

I believe that the motor starter circuit on my Ingersoll Rand 2475 5 hp 80 gallon compressor is incorrect. It's a 30 amp single phase compressor

You should not be pulling over 30 amps. If you are you may have low voltage, incorrect wire size or to long of a run for wire size. I would use a hand held meter and check the amps at full load.

Nov 14, 2010 | Ingersoll Rand 2340/2475 Electric Air...

1 Answer

Loud noise when a load is applied to compressor

Is the unit a screw, recip,rotary, ?

How many HP? Elect or Combustion driven? what manufacturer?
How many loaded hrs? how often has it been serviced in its life?
has OEM parts and fluids been used at service? How hot is the discharge temp of the air @ full load? Does the oil have a rancid smell or is it thick like honey? what kind of oil & fltrs are u using?
Is it belt or direct drive? air or liquid cooled?
Answer the best u can & I will try to help you.

Nov 01, 2010 | Air Tools & Compressors

1 Answer

On the unit model/serial# tag there is three terms.what do they mean,compressor lra/rla and fan fla

Compressor LRA ( locked rotor amps)meaning that if you hold that rotor and do not allow it to turn, it would draw that many amps.
Compressor RLA (rated load amps) meaning the amps the compressor will draw at a certain outdoor temperature usssually 95°.
Fan FLA (Full load amps) meaning that's the maximum amps the motor will run at continuosly.

Feb 07, 2010 | Carrier Heating & Cooling

1 Answer

My air compressor is running slower than normal and it won't build pressure above 45 psi even if it runs all day

hi mate there could be lots of resons for why it running slow as follows pump unit seizing up i suggest checking oil or replacing oil also check the full load current on the motor with a clamp meter if it is pulling more than 6 amps than what it should on the silver plate on the motor then this could be bearing problems in the motor so basically get a new motor or new compressor

Jul 30, 2009 | Campbell Hausfeld 5HP 26 Gallon Single...

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