I am visiting my retired parents in Mexico and have been taked to try
and figure out why their and their friends appliances keep failing
after very limited use. They have experienced numerous failures of
kitchen appliances, with microwaves and refrigerators having the most
problems. These are new relatively good quality brands that seem to
fail in 6 to 12 months. I don't have my multimeter with me but I have
been told that someone else has measured voltages from the wall outlets
as high as 129v. So I don't know if Mexico has a voltage regulation
problem with their grid? The house wiring I have observed is pretty
bad, espite being a new construction with 3 prong outlets. So I can't
confirm if the grounding has been adequately done or if there are
ground loops, et. al.
Does anyone have ideas as where to proceed? Voltage
stabilizers/regulators maybe? thanks, rick