3rd pic from left. the metal box that that is on the pipe that leads into the cylinder.
its faulty.
needs to be replaced. you can get just the head on its own and simply remove/refit it.
It's easy to wire up.
Pick up phone....dial a nest pro installer.....requested visit. Get visit,...get nest installed....pay contractor....happy nest use.
Regards, a contractor.
Not safe to change just relay. And it is a GAS SAFE TECHNICIAN only job....not DIY.
If left, it was soon simply constantly run on and you'll be stuck.
From your name I assume you're gas safe?
If so, crack on with the solder iron.
dan,
honestly, it is simples!!
i can fire these things in now in about 30mins tops.
OP,
i have added you as a friend, feel free to message me your details and i will get this looked into.
thanks,
Tim
very sorry, but i've not recieved it.
could you please send it again.
if you could put the subjust, nest job, bh31.
my email again, [email protected]
thank you,
Tim