Ive still got more problems with my boiler and i dont know what else it could be. Its a Sime Friendly boiler and the other day the pilot light went out and would not relight. I got a gas man out and he thought it was the thermocouple, changed that, no difference. Then the thermostat, he either tested or changed it but it was fine, still had the problem. Now he has changed the gas valve and we got a pilot light and boiler kicked in for CH and for hot water, water nice and hot at tap. Ive just got out the shower and the pilot light has gone out and was a pain to get lit again. What could now be the problem.