Originally posted by PeteRepeat
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Do you have any photos of your brew boiler from when you opened it up and did previous replacements of components? While you likely didn't need to replace any of the components you mentioned above, it's excellent maintenance and will extend your BES' life and basically turn it into a new machine at those component locations

If you have the old style NTC Sensor, it will be screwed into place, and sits just to the posterior (on the side) of the brew boiler from the Thermal Fuse (whitish bottlle cap, slightly smaller than actually, sized item) . . . its not on top of the boiler but on the right side of the brew boiler (the smaller boiler) if you are facing the machine from the front).
Looking at the picture above, you can see the NTC version that has the hitch/hair/pin clip (that has to be carefully pulled out first) before removing the NTC Sensor, which actually is in contact with the Brew Boilers water. If you have one that looks like it has a box wrench fitting, you'll have to screw it out carefully. Before you do that, you'll want to test it for continuity etc. using a Digital Multimeter (DMM) if you've got one?

The lug (the metal terminal with the screw hole in it) is wrapped around what appears to be a square-ish item. That square just between the wires and the screw hole is the NTC Sensor. The NTC Sensor is likely encased in a heat resistant, water resistant, polymer. The metal of the lug (the terminal connector you screw onto your Grouphead) transmits the thermal energy from the Grouphead to the NTC Sensor (the square-ish thing the shoulder of the metal lug is wrapped around).
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