Morning Ladies and Gents,
I'm after a bit of guidance regarding the Nest thermostat 3rd Generation please...
My heating system is a Glow worm 18hx system boiler. I have a hot water cylinder pump, only radiators all round, mid position valve, Y plan wiring centre.
So my issue... my old programmer broke with a fizzle and pop so I thought now was a good time to bring part of my house to the future.... I have followed the wiring diagram that came with the new wiring centre and the nest, but my boiler runs constantly. I have no control over the heating ornhot water at all. I have turned the heating off, the hot water off bacteria prevention off on the thermostat. So with everything OFF the boiler fires and runs (it ran most of the night and my house was quite warm...). The thermostat itself is wored to the 12v side and linked through the old stat cable... The heat link is as the instructions terminal 2 and 5 being linked across with the live in... I'm not sure it it's right the at the heat link but I checked the voltage across terminal 3 and N, 4 and N, 6 and N and I have 240v even when the heating and hot water is off...
I have had the motorised valve replaced also as I thought that might have been the problem.
I have tried the various reset procedures that Google says to try...
I'm hoping someone can point me in the right direction... even if it's a faulty unit...
The heating system was working before
I have tried resolving the issue with Google... no help at all...
Sorry I will attatch some more pictures when I am home if required...
Many thanks in advance for any help x
I'm after a bit of guidance regarding the Nest thermostat 3rd Generation please...
My heating system is a Glow worm 18hx system boiler. I have a hot water cylinder pump, only radiators all round, mid position valve, Y plan wiring centre.
So my issue... my old programmer broke with a fizzle and pop so I thought now was a good time to bring part of my house to the future.... I have followed the wiring diagram that came with the new wiring centre and the nest, but my boiler runs constantly. I have no control over the heating ornhot water at all. I have turned the heating off, the hot water off bacteria prevention off on the thermostat. So with everything OFF the boiler fires and runs (it ran most of the night and my house was quite warm...). The thermostat itself is wored to the 12v side and linked through the old stat cable... The heat link is as the instructions terminal 2 and 5 being linked across with the live in... I'm not sure it it's right the at the heat link but I checked the voltage across terminal 3 and N, 4 and N, 6 and N and I have 240v even when the heating and hot water is off...
I have had the motorised valve replaced also as I thought that might have been the problem.
I have tried the various reset procedures that Google says to try...
I'm hoping someone can point me in the right direction... even if it's a faulty unit...
The heating system was working before
I have tried resolving the issue with Google... no help at all...
Sorry I will attatch some more pictures when I am home if required...
Many thanks in advance for any help x