Brilliant, had me going round the bend with a Biasi advance 30c combi. Sometimes the CH would work but as I was using a netatamo over the Internet I saw my gas bill plunge to next to nothing with the tenants complaining that the heating was off. I was adamant the heating was on because netatmo told me it was on my smartphone!!

Another wonderful educational video by you Adam. Your videos and your demonstration skill is far better than most existing related videos. Well done.

This is by far one of the best videos that addresses the white elephant in the room…everyone knows about it but don’t actually know what it is for and how it works 🍺🍺🍺

Thanks for that, I thought it was a stepper motor in there. now I know

Really enjoyed that video. Excellent .. great explanation. Just subscribed.. Cheers. Mac

Brilliant 👍🏼

Thanks for that video just fixed mine

thanks for your help i tested my motor its OK . but when its in it will not switch bact to hot water no power too the motor

Nice mechanical conzruction. I think the Electronic board of boiler add the signal and it periodically round, when the boiler heats the radiators, and you open a hot water tap. But I want ask some question. What is the heating and what the hot water storage tank heating, the pin out or in? What is the base state for example diverter valve(Ariston), from above, I ask because my old Ariston quadriga heats the radiators too when only hot water is used, and vice versa. It strarted when I turned on the thermostat after 4 months of summer heating break.

Are these low voltage motors? and how many Volts in the supply leads?