A Potterton thermistor sensor designed for Main HE, Performa SL and Suprima Boilers. The thermistor decreases circuit resistance in line with temperature increases. A Boiler’s printed control board (PCB) sends a current to the thermistor, deciding whether a decrease or increase in heat is required by reading the relative resistance.
Please always refer to the manufacturer’s instructions for the correct application. All parts should be fitted by a qualified gas-safe certificate plumber.
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Suitable for the following appliances:
• 9/70/80/12/15/18/24/30/40/50/60 HE
• 12/15/18/24/21/9 SL
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