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NTC resistance

What is an NTC resistor?

An NTC resistor is a resistance that depends on temperature.

In the case of a central heating boiler, it is often used to measure the temperature of the boiler or the return pipe of the central heating system.


To measure NTC resistance you will need a multimeter.

The multimeter must be in resistance mode (Ω) and connected to the NTC resistor.

The value of the resistance will depend on the temperature of the boiler or return pipe.


Consult the user manual of your boiler for the specific location of the NTC resistance and the correct measurement values.


It is advisable to have this measurement carried out by a qualified technician to avoid any risks.


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