How To Remove F70 Fault Code On Vaillant Boiler

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The cause of this error is usually that the PCB which is the same across many models has not been assigned it’s software identity for the model of boiler it is intended for. If the PCB is not assigned this number it cannot operate safely therefore it produces F70.

It is easy to remove F70 Fault Code

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we solved the f70 problem by chaning the sensor and the quick air vent and now it works thank god 😅

nino-ouzf
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Hello, is the d.3 code the code of the hot water sensor?

yasinakdemir
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My ecotec boiler has hot water but no heating could it be the pcb board

glennmanners