Why does my Combi Boiler needs daily topping up?

how many radiator can i run with a ferroli 30B boiler combine i have 4 small 3 double 1 lager 3med and t
taken 40 to 60 min to heat all of them is it about right the boiler is only 3 years old

paul
November 2011

the Pressure Relief Valve is faulty/dirt or grit on seating on prv/
pressure vessel on boiler is faulty / check radiator valves are not leaking from the top of the valve when system is cold

frank
November 2005

i hav the same problem on a worcester boiler and its none of the above problems ! i think its to do with the auto vent system so if anybody knows anything about that plese drop a line, will post any sulotions i find that work !

gary
February 2005

Thanks for the useful reply
The overflow pipe could be the culprit.
What would cause that?
I know that when the boiler is topped up the excess goes straight through and out through the overflow
But isn't this because there is too much water in the system
Not too little
Thanks again for the advice

Chris
February 2005

preasure drop is usualy caused by a leak of sum sort you say you dont have one? but is there a chance it could be under a suspended floor which you would not notice?
another place to look is the safty discharge pipe (blow of pipe) which comes out the bottom of the boiler on the left hand side and should go outside the building usualy drilled through the wall sometimes this may pass causeing the water leaking to go unnoticed.

mail back if this doesnt help coxheadj@aol.com

ian
February 2005