DIY Doctor UK DIY Forums

i have a worcester 24i junior boiler conected to my central heating it is 2yrs old. problem i am topping up the system every couple of weeks which suggest a small leak which i cannot find. i have put in the system a liquid that is supposed to seal small leaks but i am still losing pressure. what else can i look at?
birmy

birmy,
Top up the system, turn it on and check for water coming out of the pressure relief valve. If there is you've either got a faulty valve or the expansion vessel has failed.
end