The Worcester Bosch thermistor decreases the current resistance as it gets hotter. The printed circuit board sends a current to the thermistor and can tell whether an increase or decrease in temperature is needed by the relative resistance in the thermistor.
Comes with screws
Technical specification
Waist Sizeab18cf11fxTypeThermistorCompatible With230 NG FSN Combi, 240 NG BSN CombiSupplier Part Number87161423190Brand NameWorcester Bosch