I hope someone can help me out here!
My heating (baxi back boiler) was working this morning, but isn't now.
But the hot water's ok so boiler, thermostat, pilot, pump etc are working?
The room stat, (Honeywell T40) has mains across live and earth, but not live and return.
The terminals 1 & 3 are open circuit when thermo open, shorted when closed, so the electromechanical bit looks ok.
However on the rudimentary circuit diagram on the thermostat case there appears to be a 3A? fuse, and I can't see this. Can I get the back of the thermostat off, it looks a bit like having to break in?
When I turn the heating on at the controller, there's a healthy relay clonk, similar to the functioning hot water circuit, but no action.
Any diagnoses, please? I'm thinking about the fuse in the room stat mainly, (please let it be!) or replacing the room stat, (no trouble either), or is there some other likely cause?
mike r