hello again, my boiler still loosing pressure. my dad tried a test to see if it was boiler by disconnecting from central hating system and in 24 hours it just lost half a bar. since then it was reconnected and since connected back to heating system the pressure dropped to 0 within 24 hours. no water came out of the overflow pipe, and i have checked all the radiator pipes and cannot find any leak. I am so hoping this does not mean i have to get someone in to go under the floor boards to check all the pipe work as i will end up having to replace laminate flooring as it never goes back down the way it should. I must admit it has never had a fault in 7 years but i also have never got round to having it serviced. I am dreading how much this is going to cost to fix 
