The Efficient Home Forum

Hi, the hot water icon is red because of the schedule. Since there is no flame symbol I think the Evohome isn't asking to heat it. I had this kind of issue when my CS92A was badly positioned. At that time it basically worked, but frequently overheated the water (up to >70°C). I've changed the CS92A ...

I would say that once you have the relay on, check the System Summary (access by pressing > 10 seconds on Settings), if the heat demand is 0% I would bet it's a failsafe issue.
Personally I would try disabling that failsafe to see if it helps.
But I have no other diagnostic mean to propose.

Hello, maybe there is a communication issue and the failsafe is starting the boiler ?