20 Most Recent Craftsman 33 Gallon Vertical Portable Air Compressor Questions & Answers

THIS IS ALL I COULD FIND ON THE INTERNET NOT SURE IF ITS GOING TO BE OF ANY HELP TO YOU. Do you have any other electrical appliance in the circuit that might cycle on when the compressor is starting? If there isn't enough current to go around, that might be an issue. it could be a failing pressure switch. Check your unloader valve. I think that it has failed, and as a result, the motor can't overcome the additional load on start up. If the compressor is blowing the breaker, you know that it's either a short of some kind, or the electrical motor is pulling more amps than the circuit can handle.. If you are sure that it's not a short, and the motor actually starts (it's not the capacitor), and the motor shaft turns easily (meaning that the power train into the compressor head is not binding in some way and overloading the motor) then it's got to be the motor that's at fault. Try this. Unplug the compressor, drain the tank all the way down to no PSI on the gauge, close the tank drain, and plug it back in / start the compressor. Does it start? I suspect either you are overheating your compressor to the point where it starts to seize (thus drawing more amps and popping the breaker) or you've already damaged the motor and it's cycle gets shorter and shorter before it's overheated to the point of seizing. OR TRY THIS LINK. air compressor starts then trips breaker Google Search

There is a voltage drop, excessive voltage drop in the circuit.
Anything else on that circuit?
Is the circuit wire size #12 awg thru the complete circuit to the outlet?
Any extension cords being used?
Voltage drop is found in high amperage loads. A motor needs about six times the motors rated full load amps value. Drops found in long runs of wire, in loose connections, in smaller Gage wire than needed.
The power outlet in the garage for the compressor may need the next size wire, #10 AWG. Try using a circuit breaker rated for air conditioning use, they have a trip delay.

Check for power. Check the on/off switch for power. Check the motor reset button if it is tripped, push it in. Check the pressure switch for power, check if the pressure switch makes contact if there is power.

Did you try to turn the valve the oter way? If that doesnt work you need to replace it.

The start capacitor isn't doing it's job

Not sure that this is a problem, the way you describe it sounds like normal pressure drop and then it comes on

Hi, I have a sears compressor I will take the gauge and have them check for a problem, and will replaced it good luck.

Sounds to me likt you have a bad motor, or compressor. The compressor rings might be leaking by only holding 100 psi.

The breaker may be too small. Check the amperage requirements against the breaker size.

with the power off clean the contacts on the pressure switch

Question edited for clarity. Question moved from Misc to correct category. By 'stride wire', do you mean just short across the switch? Yes you can but really you need to fix the problem. You know these things can blow up and spray shrapnel 30 feet? Google Craftsman (model) parts You may have a short in the motor, in which case, shorting it out won't fix it. https://www.google.com/search?q=Craftsman+Air+Compressor.+I+have+to+press+the+reset+button+on+it

regulator is bad, or tank is not low pressure. you could return it for another one.

capacitor weak --motor drawing to many amps if using extension cord[s] not correct or to far from source and causing to much voltage drop -motor faling--compressor failing

question moved from Television and Video category. It is a well documented issue. https://fix-my-compressor.com/33-gal-craftsman-compressor-keeps-tripping-the-breaker/ Lots more here https://www.google.com/search?q=33+Gallon+Craftsman+compressor+it+runs+for+about+20-30+seconds+and+trips+breaker ..

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