Berlan BMIG 140 Mig welder failure help help help

My welder was playing up the other day it just stoped working altogether there is power to welder pulling trigger nothing happening gas still coming through. adjusted wire feed contoll back and forward a couple of times then it worked again then is stopped now today there is nothing happening at all still power to welder fan gas ets but no arc or wire feed could it be the variable resistor that is shot??

Might help if you actually said what machine it is so I can put this in the correct forum i.e welders and welding machines

Edit: Moved and title edited.

sorry its a berlan bmig 140

Hi,

this could be tricky if you've no experince of faulting to component level.

Basically switch off and remove the mains plug from socket, pop the lid off the welder and sytematically check for loose connections, burning on the circuit boards, etc. If you remove any plugs internally mark them so you can get them back on the right sockets and the right way around.

Maybe do a quick sketch or take digital photos as you're working, etc.

If it is a variable resistor then it may just be dirty, there's cleaning spray that you can buy for a few quid a can from electronics shops...spray inside the resistor and work the control knob left and right to clean the tracks.

If it doesn't work after this and there's nothing obviously wrong then you're down to faulting with a meter.

The variable resistor probably has writing on it stating what it is and if you can get one they're generally easy to change with a soldering iron.

Final option is to find someone who can repair it...look in the plasma cutter folder, someone today posted a company name where they work and said they can repair a Cut40. The Berlan should be similar technology even if it's a welder rather than a cutter and they may be able to help.

Note, there's probably some big capacitors inside the welder, usually look like a small bean-tin...they'll hold a charge for some time after the power's removed so keep fingers away from contacts!

Regards
Peter