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Resoved this by adjusting the direct hot water (DHW) temperature at the control unit for the boiler. Thanks for the feedback.

Oh, I forgot something; as this supports an external sensor via pins 1+2, is anyone aware of a cheap wireless temperature sensor only (sender->receiver) compatible with this thermostat? It's just that kitchen is way colder usually because of the garden entrance than other rooms, so ideally, I...

Right. All is good now. Grey wire was a bit worn and loose in the thermostat socket 3 - so the contact was off. With a fresh wire strip and a bit of tinning, connections are correctly secured now. Thanks, Ian & Chris! It's a nice little thermostat for the price with remote control and...

It's just a weird photo angle for the thermostat so pin1 looks scaled-down, there are 8 pins as per the wiring print on it. Bought it from here https://www.amazon.co.uk/gp/product/B09JZ6FDVR/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&th=1 Yes, the boiler heating switch is ON (so not using the...

The PCB installed in the boiler is as in the photo I took above (top section and connectors). Yeah, just realised. I couldn't find the manual so was looking online from here https://www.vaillant.co.uk/downloads/z/ecotec/ecotec-installation-servicing-2007-372783.pdf but the PCB board layout is a...

Morning. So, all wired up (L+N -> L+N and no-volt grey->3 black->4 on the thermostat), but it's not closing the relay circuit on the boiler side (that's RT white connector on boiler PCB). In a way, I can hear the relay click on the thermostat, but the boiler heating pump is not starting. It...

As per the title, the PCB on the boiler failed after 10 years - so I've replaced it by myself (exchanged the faulty one with a refurb one and with a 1-year warranty). All is good, but the hot water is not hot enough! Even if I turn the bath or kitchen tap to the max. Is it possible that this is...

Cheers! Yes, that was the source of my confusion, primarily because o 24V label on the PCB connector. But, looking at the boiler manual, it doesn't need supply voltage indeed, so volt-free relay pins from the thermostat make sense. On the boiler PCB, there is a separate 230V connector for the...

Hi there, I've purchased the new smart/wifi controlled thermostat, but not sure that I have enough confidence to install it. So, placing a few questions here for some advice before I decide further or if this is compatible. Seems we had a couple of similar posts already (that's how I found this...