C
Chris Pugh
HI Guys i had a unvented cylinder fitted onto my existing system boiler some years. The guy that fitted it didnt install an expansion vessel he just left the F+E tank in the loft. so we just have mains pressure hot water while the central heating is an open system. Anyway a month ago hot water two way port valve on cylinder didnt work. so ive changed the valve head and it seemed to sort it. recently ive only got tepid water from hot tap. two way valve opens when i demand hot water. pump seems to kick in just fine. so im at a loss why the water isnt that hot. checked the temp setting on cylinder and when i turn temp down . valve shuts and pumps stops so can i assume the stat is working properly. Is there anything else i can check before i call in the experts!!. im a bit worried the could be a crack in the coil of the cylinder??? but then im thinking the incoming mains water would make the F+E tank overfill. could it be a faulty stat?? but when i adjust the temp lower the pump etc switches off. So it seems its working. was thinking its the boiler but when i switch the heating on boiler fires up and stays on unlike the hot water where the boiler fires up and stays on for 5 mines then turns off. Im away for a week tomorrow so my daughter will have to cope i suppose but im clueless what to look for. Suppose ill call an engieer out when i get back but its bugging the hell out of me.. anyone got any ideas!!! i must be missing something obvious!!!. be gentle with your replies..lol
