I don't have a cooler yet but things I've considered for maintenance:
I suggest putting a piece of tape on the front of the cooler with a date the coolant was first added and a date to change it out as per coolant manufacturer's instructions.
If you're running straight water you might consider running Dezcal thru the machine with a full tank of water to get out any scale built up in the machine/pump, then flush with clean water. Dezcal is safe for plastic, rubber and stainless parts. I use it in institutional size coffee/espresso machines etc.
I would also suggest leaning the cooler on its side periodically to verify no moisture or stains on the bottom/base of the machine which might indicate a problem.
Consider powering up the Cooler without the welder periodically to verify it isn't making any unusual noises that would normally be masked by the welders fan.
Hopefully I'm not insulting anyone's intelligence with these...
Last edited by Zoomie; 03-17-2011 at 11:15 PM.
PowerTig 225LX
PowerCool W300
PowerPlasma 60S
Miller 140 MIG