VAILLANT 0020100991 TEMPERATURE SENSOR.
The thermistor is a part which is used to alter the resistance of the circuit if the temperature changes. There are two types of thermistors PTC or NTC, it is important to use the correct thermistor as these are designed to be used by the control board to detemine if more heat is required in the system depending on the thermistors resistance .
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The VAILLANT 0020100991 TEMPERATURE SENSOR is a genuine, brand new Vaillant Boiler Spares product, covered by a Vaillant Boiler Spares manufacturer's guarantee.
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