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Hi thanks for reply, and no heating flow pipe does not feel very hot, when heating goes off.

Sorry guys maybe I need to be clearer. The boiler is a ferroli optima combi, 77cf/ff. Working fine till a couple of days ago. It just stopped, called engineer out who appeared to clean near the burner, bled radiator and bolier came on. Engineer left and 2 hours later, heating off, hot water...

It has been happening for the last few days. i had a guy out who seems to think it may be the PCB or diverter valve, not sure which. Central heating keeps going on and off. He does not seem to think it is the thermostat, has also turned the pump up to 3.

Hi Guys, i have a ferolli optima. the problem is it is giving me constant hot water, but the Central Heating is only luke warm. It comes on for a few minutes and switches off. I would be appreciate any assitance.