We have a home with 1970s aluminum wiring. We had some electrical work done a year ago, and the electrician "pigtailed" all of the wiring with copper wiring at the new outlets but didn't otherwise make changes.
We had a well-used espresso machine that began leaking a few months ago, then it started tripping the GFCI every time we turned it on. We decided that it was past its useful life (not worth attempting to repair the leak and now an apparent short) so we tossed it. We began using an identical (also well-used) machine which has worked fine the last few months, but it has suddenly started tripping the GFCI. So now I'm wondering if it's the machine or the wiring. With trepidation, I plugged it into a non-GFCI connected outlet in the dining room and it worked fine. So that would seem to indicate that the machine is OK. We are using other appliances in the kitchen GFCI connected outlets without a problem (coffee maker, grinder, toaster oven, blender), so that would seem to indicate that the outlets are OK...so which is it??
I really want to use my espresso maker and keeping it on the dining room table isn't a great option. Do I have to call an electrician to figure this out?