Greener, in your earlier post you mentioned buying your mm211 "quite a while ago" - I'm hoping for your sake that does
NOT mean it's out of warranty
I've only had Miller MIGs, both versions of the mm211 and the MM252, and one thing I've noticed is that
ALL of them cool by pulling air IN AT THE FRONT - for the life of me,
I CANNOT understand the SANITY of doing that; that is the
MOST LIKELY place that will see grinding dust or slag, so why not pull cooling air FROM THE BACK INSTEAD???!?
I put too many hours into my custom cart for the newer MM211
Well, about 40 posts ago I mentioned getting some self-stick rubber matting from HF to put under the gas bottle on the weld cart - changed my mind (again??!?) and decided to mat the WHOLE FLOOR of the cart for now - if'when I add a deep drawer it won't slide on the bottom ANYWAY, so may as...
www.tractorbynet.com
to wanna "buy it again", so my "bandaid" for that engineering brain fart is a 2'x3' piece of OSB - leaned up against the front of the welder with plenty of room for "side" air but
NOT DIRECT CRUD at the air intake - IMO, OSB isn't good for anything else ANYWAY
I know it's not possible to "prove a negative", but if my inverter 211 craps out even WITH the "crap baffle", I'll know that there's more than ONE design flaw involved... Steve
Edit - at least, with the exception of the transformer MM211, the inverter 211 AND the MM252 have "fan on demand" so would be LESS likely to suffer from pulling in crap at the front...