Question about Hobart Handler 140 Mig Welder

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How would one attain a replacement for the main circuit board

My machine hums, even when swithced off. Also the feed sometimes just stops working. Also the gas relay seems to be stuck open, as gas flow is constant when tank valve is open.

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The main control circuit for the welder has gone bad....cost about $198.
Might be better off to buy a new welder.

Posted on Feb 03, 2010

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Posted on Jan 02, 2017

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1 Answer

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Hi ircatlin...

ONLY TO THE FOLLOWING IN AN OPEN AREA AWAY FROM FLAMES/FIRE/IGNITION SOURCES.
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Check to make sure gas is getting thru the regulator...to do this disconnect the hose going to the burner controls...turn on the gas at the tank and listen and smell for gas coming out...if there is no gas coming out, you can sometimes tap lightly the gas regulator and it will free the sticking valve inside and let the gas flow...if the tapping does not work, the replace your regulator as it is faulty.
Please take time to rate me

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One side glows like a champ. The other side, dedicated for High setting, pooffs when I turn it to high, then kind of fickers and barely glows. I have a fuel filter and a six foot hose off of a 20#...


dirt , foriegn material,spider web in gas feed line to the right side ceramic element of mr heater big buddy. take plastic back of heater
off, many #1 philips or smaller screws. find large air induction holes
in gas feed line to right side ceramic element and blow out with compressed air and fine tiped /straw tipped air blow gun.
straw tipped air blow gun is a better tool for this.
reassemble & try lit mr heater again.
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If this dont work,need to take the gas feed line off the gas valve attached to Mr. heater red knob. red knob just pulls straight out, might need pliers to grab red knob.
check gas valve output for dirt etc that stop gas from getting through. check inside the gas line to the ceramic burner for dirt,
foriegn material- that stop gas from flowing through strong.

any stopage of gas flow , even a slight stopage or dirverting of the gas flow, spider web is common, will stop ceramic element from burning properly.

needs to be clean ,like a carburator.

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sewman7

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1 Answer

WHIRLPOOL GAS DRYER MODEL LGR7646E


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