It is a safety device that fails when it senses high temperatures in case the main control thermostat fails.
Suddenly I heard a popping sound coming from inside the iron.
It was the iron all right.
Place the leads of the multimeter on the live and neutral and check for 240V or 110v depending on your country.First of all, I bought this iron about two or three months ago so it's fairly new.Plug in the iron.Open top cover, you will see the heating element.Check for continuity between the ends of the element, If no continuity the element is dead and you need to buy a new iron.If you can find a replacement replace it, if you cant find a replacement, you can use it and hope the main thermostat does not fail.
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Be careful not to get electrocuted.
Check that the cables from the socket on the wall have power.
That was a very close call.
I quickly unplugged the iron and took it into the kitchen and set it in the kitchen sink to cool off.This looks like a small resistor about one centimeter long, if it has no continuity, cut it off and bypass.Check that the fuse.If it is ok, open the cover at the back of the iron.I could feel the heat and I could smell burning metal.Then I realized the iron was getting very, very hot!