Great, you found the problem! Faulty triac
I can’t make out the markings on the IC as your photo has gone thumbnail size for some reason but looks like an ST BTA16 ?
If yes, It’s a jellybean part manufactured by several companies not just ST
You can just grab them off ebay if you want and it might be worth picking up more than one, just avoid the chinese listings else you’ll be waiting a month
Prior to fitting the replacement triac, might be worthwhile checking the few resistors surrounding it in the area and making sure their values are an approximate match to their respective marking… This is just in case one has burnt out due to the short.
I can’t easily make out solder joint condition from your image unfortunately as it just breaks down when i zoom in but based on what i saw on your previous images, i’d go round the board and touch up all through hole joints at a minimum which should prevent future issues.
I ask only because apparently on certain 110V models/variants of this station some had the fuses wired incorrectly, instead of correctly wiring the fuse in-line with the Live wire they incorrectly put it in-line with the neutral. So might be worth checking that on yours and making sure, just don’t trust the wire colours within the unit but instead check which side is L and N by checking a pinout of the IEC/Kettle socket in order to determine.
Hope that makes sense
This will make it’s way from the board > connector > wire and then finally inside the handle. I wouldn’t worry about this for now though as I’m no longer expecting a fault there.