Question about Hobart Airforce 250ci Light Weight Plasma Cutter With Air Compressor #500534

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Hobart 250 ci power and temp lights flash

I turned the power on and pull the trigger and the compressor runs but it will not arc and both lights flash

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SOURCE: hobart airforce 250 ci has power but will not operate

make sure that there is air to the plasma and set at the proper psi. Make sure that the contact tip and nozzle is in the cutting head correct.

Posted on Dec 18, 2009

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1 Answer

Phase three on cv or cc have current going to mig wire, wire is live without hitten gun trigger. mega arc is hooked up to a Hobart suitcase


May need to take gun apart and see if trigger is sticking or replace lead.

we use Miller at work. The feeder has a switch that makes the trigger turn off and on with quick pull of trigger so you don't have to hold it entire time.

check wiring to make sure it's wired right so your not bypassing the trigger switch.

hope it helps.

Nov 02, 2015 | Hobart Welding Tools

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Machine turns on, air compressor runs but will not strike an arc


sounds like the voltage is not getting to the tip. I would suggest taking this in for repair.

Dec 07, 2013 | Hobart Airforce 250ci Plasma Cutter 12...

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Thermal Dynamics cutmaster 81. when turned on it cycles blowing air but no arc. two green lights are flashing. pulling the trigger doesn't do anything, air keeps cycling


Hi; Check the following troubleshoot and see if you can ID the problem:
Problem: Gas flows continuously when power is turned on, AC indicator flashes 1. Torch switch is activated (closed) before user turns power on. a. Release torch switch. 2. Faulty torch switch a. Check torch switch for continuity. Replace if necessary.
Problem: Gas flows continuously; Torch will not pilot when torch switch is activated; AC indicator ON 1. System is in SET mode a. Change to RUN / Rapid Auto Restart / SET switch to RUN (up).
Mostly of the problems found is that customer has the switch line on to SET instead of RUN.
Hope this help. Have a good afternoon.

Sep 16, 2011 | Welding Tools

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My hobart handeler 125 will not stop feeding after i release the trigger, why?


The trigger is bad in the gun. It sound like the spring is bad, or you have some junk in the trigger not alowing it to release. Remove and inspect/clean the trigger.

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1 Answer

Only cuts for 3 seconds, device still on


Possibly an internal short in the torch tip... the expendable components failing in the tip will cause the sensors in the machine to register a "no cut" or "free air arc" state and kill the power to the tip to prevent damage to the unit. Replace the tip components and double check the grounds connections.

Apr 03, 2010 | Hobart Airforce 250ci Light Weight Plasma...

1 Answer

My Hobart 250 airforce doesn't start


On the main circuit board for the power supply, there is usually a thermal fuse installed, its a sealed unit and is not servicible, look for a black epoxied case,approx 3/8x3/4 long, with 2 leads coming out of it. Inside is a set of bi-metal contact points which serves as an over voltage/over current protection. These contacts deform/corode over time and it sounds like there not contacting properly. As soon as you try to load the machine, the current passing through this high resistance heats these contacts up, and shuts off power to the unit. I am not familiar with the guts of a hypertherm, but have extensive experiance repairing inverter based plasma cutting equipment, and i have encountered this before. I assume hypertherm must have some equivelent to this thermal switch inside the power supply.....Good luck..

Dec 29, 2009 | Miller Hobart AirForce 250A Plasma Cutter ...

1 Answer

Hobart airforce 250 ci has power but will not operate


make sure that there is air to the plasma and set at the proper psi. Make sure that the contact tip and nozzle is in the cutting head correct.

Dec 18, 2009 | Hobart Airforce 250ci Plasma Cutter 12...

1 Answer

Hobart 250 has power to unit, but will not run.none of the lights come on.


Sounds like you have more than one problem. Check all fuses. Bringing it to a welder repair shop might be a good idea. Welding suppy houses may be able to help you in your area, and maybe recommend someone.

May 01, 2009 | Hobart Airforce 250ci Light Weight Plasma...

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