Added spool gun to welder tested fine now neither will feed

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Added a spool gun to power mig 200 and tested both guns feed wire.  Didn't have any argon gas so could complete testing.  Went back to it a couple of days later and now neither gun will feed.  Im new to this any help would be greatly appreciated.  Thought it might be a fuse but can't locate any inside welder. Jeff
Reply:Check the control voltage it should be around 24 volts.Dave

Originally Posted by JeffreyIII

Added a spool gun to power mig 200 and tested both guns feed wire.  Didn't have any argon gas so could complete testing.  Went back to it a couple of days later and now neither gun will feed.  Im new to this any help would be greatly appreciated.  Thought it might be a fuse but can't locate any inside welder. Jeff