Haven't got the answer, but I've got a baxi solo boiler that is playing up. It fires up, but switches off when it appears to hit the boiler thermostat temperature. It wont come on again until I think the boiler has cooled down, even though the hall thermostat is asking for heat. Don't know whether its eletrical, something to do with the pump stopping when the heater reaches the thermo stat temp, instead of carrying on feeding the water through. This is just a thought I have, Im not trained in these things. Any other views to me would also be welcome. I've not had an answer from my post a week or so ago.
Geoff Bullen, January 2010