a o smith thermocoupler replacement

big mac 154

I;m replacing the thermocoupler on my pro max water heater. However, the honeywell universal replacement doesn't match the existing one. the smith tc is actually two pieces, with what seems to be a sort of fuse between them. The replacement is a single copper line.
Can I just bypass this fuse contraption or do I need to buy an actual smith replacement. I saw something that ao smith knew there were problems with their tc
Thanks for a prompt reply. we need to take showers here!!

Dave

yuri

Sometimes they make them with backwards or left hand threads and so that only theirs will fit. May have a fusible link which is required by UL and AGA codes so if you bypass it then you could be liable.

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kenmac

If that's the newer type wh with piezo ignitor. regular thermocouple won't work