I've got a problem with my boiler, a Ferroli Optima 701, in that it will work just fine for an hour or two, but as soon as it's turned off the pressure fairly quickly drops to zero. After this I have to feed in water using the isolator, and the pressure stays in the system until the next time the boiler is turned on (and off) again. I can (!) get hot water and heating, but only by allowing water into the system prior to any usage.
I've checked the pressure release pipe, and it doesn't seem to be leaking, dripping or squirting at all. I've bled all the radiators (when cold, after re-pressurising) with no spectacular results, and I can't find any evidence of wetness around radiators and pipes or dripping noises anywhere. The house is timber floored, but it's tricky to get underneath in a lot of places - but none of the pipes are set into concrete.
Is there anything I can try to get this fixed? It seems like a strange one to me - I guess if anything in the system were leaking it wouldn't hold pressure overnight (while the heating is off), but I'm very happy to be wrong and someone give me some pointers!
Many thanks in advance,
MohThoM
I've checked the pressure release pipe, and it doesn't seem to be leaking, dripping or squirting at all. I've bled all the radiators (when cold, after re-pressurising) with no spectacular results, and I can't find any evidence of wetness around radiators and pipes or dripping noises anywhere. The house is timber floored, but it's tricky to get underneath in a lot of places - but none of the pipes are set into concrete.
Is there anything I can try to get this fixed? It seems like a strange one to me - I guess if anything in the system were leaking it wouldn't hold pressure overnight (while the heating is off), but I'm very happy to be wrong and someone give me some pointers!
Many thanks in advance,
MohThoM