A Glow-worm part, this thermistor is designed to be used in Eden, HXI, CXI, British Gas, C-CI and SXI boilers. The thermistor decreases circuit resistance consistent with temperature increases. A boiler`s revealed manage board (PCB) sends a modern-day to the thermistor, identifying whether or not a lower or growth in warmness is needed through analysing the relative resistance.

