I'd appreciate some advice with resolving the following problem with my Syncrowave 180 SD - After being stored for the past 4 months in the garage I started the welder up today and to my surprise it seems to be stuck on max power using both stick and TIG. Striking an arc results in a hole blown in the metal ( a big surprise in TIG!); switching the polarity, current dial changes, etc. do not solve the problem.

The welder is 10 yrs old, used for small projects and probably has no more than 15 hrs of running time on it. There were some cob webs inside the welder case but nothing obviously wrong. I'm totally stumped!! How could the welder go bad just sitting!?

Thanks for any advice /help! - M. Brown