My Ferroli Optima 701 boiler keeps losing pressure?

check your boiler flush sytem valve, this valve taking the biler water out side the property. also to conform the fault put buket under this flush pipe(should found out side the property) and check in the morning.
This is the only valve that take the water outside the property .the boiler get empty during night check all outlet valve to makesure that they had no leakege. goodluck

moh
September 2008

I am having the same problem with my Optima 901. I was told that it could be the result of a very small leak in one of the pipes that might be out of site. A leak sealer should apparently solve the problem - this is put into the system and seals any small leaks. I haven't tried the leak sealer yet, I'll let you know the results. Have you had any other advice on this problem.

Ben
February 2007

Have a look 'outside' to see if the over flow which goes out through wall (under boiler) is leaking, if yes.... you will need a new pressure relief valve

Mond
February 2006