Gas Training Thermistor NTC Hot water temperature sensor of the mistress the commonly known There are what's called an ATC sensor What that means is the temperature goes up the resistance goes down And you measure them on resistance Quite a common sensor this has been used by quite a lot of other manufacturers Baxi's been using it very similarly for not the same sensor for a good number of years On the earlier boilers going back to 105's early due of techs they used to have a fiber washer and that could leak They've now changed over a few years ago to a copper washer So the copper washer is now available as a spare 721198 That's your partner if you need one of them It's one of the few partners I can remember So that's the temperature sensor Again in future videos we're going to go through testing these #plumber

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