Originally posted by kamold
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A common one is at the top of the machine where the NTC wiring exits the wand, there's a cable tie that holds it to the side of the chassis. Sometimes they didn't allow enough slack in the wiring and the point where the cable tie holds the wire can stress it. Repeated stress can damage the wiring internally and cause an intermittent break.
I would suspect your issue is still related to the steam wand system. The triac board is unrelated to the steam wand. If you have had internal steam leaks then the triac board can be damaged but this will show up as overheating or failure to heat (due to overheating blowing a fuse).

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