I've got a PTC thermistor, as pictured. It's being used to detect the output temperature in an in room eletrothermal storage (ETS) unit from Steffes.
One of them fell out. It's like some kind of rough material on the outside and I have no idea how they ever got it to adhere to the board in the first place. Also, the one that fell out is damaged a bit.
Anyway, how would I reattach it? What soldering technique was used to get the one on there on. BTW, I found something like them by the 2500 at digikey. It says "clamp on", maybe that's why the other one fell off, these are just held in by the tension on the wire? That doesn't seem right.
Also, how would I identify just what the specs of the thermistor are? I have some hints. The thermal fuses have two different ratings, the lowest of which is about 160°C and there is 250V going to the board (AC, home heater connection).