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Does anyone know if these readings are normal for Thermister side. First measurement boiler hot checking at plug pulled off PCB board. CH 4.3 K ohm DHW 4.7 K ohm Measurement at plug connected to PCB board with power on CH 11.80 M ohm DHW 12.50 M ohm. Next set of...

I have being doing some more anaysis and received this inforamtion of Ariston for sequence of events which is so useful. Usually turbine, magnet flow switch (right hand block) signal to pcb. Pump, flow switch, thermistor ,fan-switching via relay pcb-to close APS ,gas and spark –flame and then...

I should added boiler in econ mode and winter mode for CH but obviously off via remote room stat. I also appreciate if kept on comfort mode probably fix issue as keep firing boiler on but this would only mask fault. But not tried this.

Good Morning, I'm new to this forum and joined after much frustration with trying to fix this boiler. Im mechanical engineer so pretty hands on with most things but obviously do not knows precise in and outs of boilers but learning fast. The fault is Dhw does not switch on after period of time...