Lincoln weld pak 100 wont feed wire.

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Hey guys, i just got this welder from my brother in law. It stopped working on him and i wanted to try to fix it and begin to learn how to weld. It just wont feed. It doesnt try to feed. Its not getting power at the terminals. The fan is running.
Reply:Do you check the gun trigger?Mauricio
Reply:I took it apart and it looked ok. Other than that i dont know how too.
Reply:Does the wheel rotate when you push the trigger?Mauricio
Reply:No sir.
Reply:You need that the wheel rotate, in order to feed the wire through the gun.You could check the motor that rotate the wheel, if it is burnAlso chech the wire adjust potentiometer.Check if you have enough pressure between the wheel and the wire, if not adjust the armThe wheel that is install right now, is the correct one for the wire diameter you are using?Mauricio
Reply:You need a wiring diagram (download from Lincoln) and a VOM. Then you can "investigate". Does the trigger close its control loop? Is your thermostat "open"? Does your motor have power? Et ceteraHopefully you will find a simple inexpensive cause and not that your board is burntXMT304 (school)SP125+ (home)HF 4x6 BandsawGood judgement comes from experience and much of that comes from bad judgement.
Reply:When this happened to my weld-pak 100, it was the trigger assembly, just not closing that gap and completing the circuit.  Not saying that is the case here, but it was with mine.Check out my channel

https://www.youtube.com/channel/UCkz...bZg8AYNXGqBjZQ"Both oligarch and tyrant mistrust the people, and therefore deprive them of arms." - Aristotle
Reply:I've said it before, I'll say it again.  The Lincoln  Weldpak 100 was/is a disservice to the hobby welder.   Lincoln should have never stooped so low to make crap like that. Do yourself a favor, get yourself a better made machine.Lincoln Power Mig 216Lincoln AC/DC-225/125Miller  625 X-Treme PlasmaMiller 211 Forney 95FI-A 301HF 91110Victor Journeyman O/PMilwaukee DaytonMakita  Baileigh NRA Life Member
Reply:There is a diagram on the inside of the cover. You need to get a volt-ohm meter.First you need to make sure the gun trigger is working. ohmmeter test.If ok, unplug and remove cover.  Clip  voltmeter leads to the small terminals on the fan motor.stand clear and plug welder back in and turn it on. Should read 24 volts ac. The large terminals will read 120 vac. The 24vac is the power supply to operate the pcb.If no 24vac the fan motor will need to be replaced. Next clip meter to pcb terminal H1 and H2.If pcb has power and the relay on the pcb is good you should get 120vac when gun trigger is pulled. Next use the diagram on the cover to follow the weld circuit through the transformer and voltage switch. Then the weld diodes to the capacitor and weld terminals. AC voltage to the diodes and DC after that. You must have DC voltage at the weld terminals before wire drive motor will work. Weld voltage is sent up to the pcb and this voltage is controlled and sent to the motor.  Wires 213 and 214 to the pcb must have 24vac for the pcb to work. Gun trigger closed. good luck
Reply:Where is the thermostat located on the welder. The diagram states on the sec coil but I have no clue where it is.
Reply:It would help with a photo of inside. A schematic would help too.Dave

Originally Posted by evilclown312

Hey guys, i just got this welder from my brother in law. It stopped working on him and i wanted to try to fix it and begin to learn how to weld. It just wont feed. It doesnt try to feed. Its not getting power at the terminals. The fan is running.