smartvendnw Posted July 25, 2016 Share Posted July 25, 2016 I noticed a loud humming noise on my USI 3184 iVend. You can only hear it when the door is open, not when closed. Anyway, it's source is directly behind the switch panel. The machine works fine so far- no issues. Just doesn't sound right so thought I'd ask if anyone has ran in to this? BT$ Link to comment Share on other sites More sharing options...
CajunCandy Posted July 25, 2016 Share Posted July 25, 2016 Check transformer behind panel. I had one that was loose humming until I tighten it. Link to comment Share on other sites More sharing options...
SCOTT1963 Posted July 25, 2016 Share Posted July 25, 2016 Cajun is right, first thing to check is the mounting nuts and bolts, tighten them down. Second make sure your ballast is tightened down. If you still get the humming check the ground. Still buzzing replace the ballast or install LED lighting Link to comment Share on other sites More sharing options...
AZVendor Posted July 25, 2016 Share Posted July 25, 2016 It could just be a tendency of the transformer. Some are just noisy like that. If you can't hear it when the xoor is closed then there's no need to worry about it. Otherwise the only fix is a new transformer. Link to comment Share on other sites More sharing options...
smartvendnw Posted July 30, 2016 Author Share Posted July 30, 2016 Everything checked out. Nuts were nice and snug. Maybe cause it's literally sitting on the plate I'm hearing the vibration and humming. Anyway, thanks I'll just kinda watch it I guess as the machine works great so far. BT$ Link to comment Share on other sites More sharing options...
AZVendor Posted July 30, 2016 Share Posted July 30, 2016 The humming is common on some USI machines. It's just what some of them do as they age. Link to comment Share on other sites More sharing options...
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