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Compressor draws 50 amps on start and drops out? Mod. 700-800 about 10 years old.

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Most likely bad motor. 50 amps is way to much at start. Motor locked up.Nameplate may contain LRA rating which stands for locked rotor amps. If you near or above motor is seized.

Posted on Aug 19, 2010

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3 Answers

I have a 5 hp compressor. It will turn on and run maybe 5 seconds and then kicks my breaker out.


you could have a weak breaker or the breaker is not rated for the draw of the compressor have a pro check it out

Mar 02, 2015 | Campbell Hausfeld WL6502 5-Hp 20-gallon...

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

My ec12 runs for about 5 to 10 seconds then pops the circuit breaker


The EC12 actually draws approximately 15.5 amps when starting, so you are best served to use without extention cord on a 20 amp circuit. One thing that will improve operation, is to use 5w-50 full sinthetic oil. Fill to notch in dipstick. If possible change your overload switch to a 20 amp. It is currently a 15 amp. (cause right there for continual overload). I unplugged my reset button and added a piece of #12 coated wire as a jumper (do this at your own risk), but I've been fine for three years now. #12 wire fits right into the clips that attach to the reset button. Good luck.

May 25, 2014 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

1990 festiva blows 10 amp but blows fuse after engine staetsfuse everything woeks fine with key in on position


Get a wiring diagram & see what is on that fused
circuit & work that circuit. Leave the fuse out at
first & make sure only that fuse & circuit is involved

When a car gets over 15 years old, then & only
then, do you start to have fuse issues as wiring,
connections,relays,switches & devices using electrical
current, start to get loose,corroded,& develop resistance

I would remove & clean every ground wire on the car you
can find

Both ends of the battery cables as well

Do voltage drops afterwords on cables

Check for alternator diode leakage or what
is called a/c ripple

Check for current draw by putting an amp meter
in series with either battery cable & wait for things
to time out,make sure you leave the doors closed
& allow at least 10 to 15 min.

You shouldn't have over 50 to 70 milli-amps

Just the clock & computer memory & some keep
alive items

Don't keep replacing the fuse,that is not a fix

Nov 13, 2012 | Cars & Trucks

1 Answer

The rla on my weather king ac specs says 26 amps but a serviceman measured the current at 40 amps. he said the compressor was on its way out and recommended i install a new unit. is he correct? what would...


Hi, if a compressor draws that many amps above its running load amps, it is not normal at all. It would be tripping the breaker at 25 to 27 amps!! If the compressor is overloading that much, it wouldn't run at all.It could be that your outdoor coil is very dirty causing this reading. Take a water hose and wash it out good. Careful not to bend the aluminum fins when doing this.If the specs say 26 R.L.A., it wouldn't run at all at 40, no way at all. This tech must be green, or very fresh out of school.Wash the coil to bring the head pressure down, and see if it starts cooling. Any compressor that draws max amps will shut off on internal overload. If the compressor is on its way out, and he said its drawing 40 amps, it would be locked up, L.R.A, locked rotor amps. Wash that coil very well, as this is what causes high amps, and see what happens. He is wrong.Have them send a different tech out free of charge, and tell him what I have told you. If the compressor is 30 years old, it still could not draw that many amps, as the breaker, or fuse would blow in a second, or it would lock up! Please keep me posted,
Shastalaker7
A/C, Contractor

Jul 12, 2011 | Weather King Heating & Cooling

1 Answer

I have a 25gal 5.5hp Craftsman compressor. it is


The only thing I can think it might be is something else is running on that breaker. But for it to snap a 30 amp, whoa. The 5.5 hp motor probably draws 18 amps on start up if not more. But then runs on 12 or 13, so for it to snap a 30 amp, I don't know. The capacitors, you have 2, could be drawing too much. One thing, what is the 30 amp breaker for? Is it 220 volts? Is your comp 220 volts? Check this stuff out. I'm not sure how you test the capacitor, but don't go messing with it, it holds a charge. Hope this helps.

May 19, 2010 | Craftsman Air Tools & Compressors

2 Answers

AC compressor won't start


hi,you might need a new compressor...you will need need to go back were you bought capacitor...buy a hard start capacitor too..this might crank the compressor...hope this helps.if you buy it..call an ill tell you how to wire it...if it dont ,you need new compressor...call michael..doctor airr..appl.repair...843-384-8474...

Mar 27, 2010 | Dometic Rooftop RV Air Conditioner

2 Answers

My air compressor trips the breaker before starting up, it seems to have a hard time winding up to speed then kicks house breaker.


Are you sure your breaker is Motor rated ? you see often a motor will draw 3-4 times the amount or run current at startup, you normally need a special breaker for such a thing, or at least a breaker that will accommodate the "In rush" current at startup. That is always assuming there is no short between Phase and Neutral/Earth. Please check. In the "old"days a "Fuse" had enough headroom to do this some breakers are real pedantic about trip currents, as they should be.

Feb 20, 2010 | Air Tools & Compressors

2 Answers

Shut down once, some clicking noises. Now is runing fine.


Probably a bad compressor start relay.
Replace the relay before you condemn the fridge.

May 24, 2009 | Kenmore Refrigerators

1 Answer

Maytag refrigerator 6 years old wont cool down in freezer or frig. making a click sound every 5 min or so from the rear of the refrigerator by the compressor


either the compressor or the compressor relay is bad, need amp meter to check amp draw on compressor to verify problem

May 17, 2008 | Refrigerators

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