Just had a thought and a slow day yesterday with a rainy day so I was checking out the machine and noticed that there are no threads about regular maintenance on your welder.
Wipe down the vent areas to make sure no spider webs or anything is blocking air flow.
One of the main things to do when you have a welder with potentiometers all over the place is to run the knobs all they way back and forth a few times so that the coils or carbon in the pots do not get corrosion on them ,Florida is bad because high humidity, and Because ussually people have a tendancy to set the knobs and forget them once they get the settings where they like them and just set amps for the material thickness. So about once a week or when you think about it run all of the knobs (pots) all the way in both directions and also click all of your multi funtion switched through all of their ranges as well so you dont end up with dead spots in the pots after a while . Dead spots in a pot can make you scratch your head because it can go all over the place and until you turn that specific knob you will never find out where the problem is.
Just a thought.Most people know but they never think to do it.
Gary