one day last week my boiler wouldn't work hot water or heating then i took a look myself and the water in the loop where its got the pressure guage which is the operating pressure was at 0bar so i fill the loop up to 2bar then there was hot water and heating but after two days the water in the loop finished again the operating pressure was 0bar and i repeated the process can you tell me what is wrong?

hamid, November 2013

think 2 bar is to high.sit it around 1.1 bar when cold.then retry.If it still looses pressure you have a leak,faulty pressure release valve or expansion tank

A1, November 2013

fill system up to 1bar fire boiler up and watch pressure gauge,if pressure rises to 3 bar check previous questions about expansion vessel pressures,if not it could be the expansion relief valve that's faulty or you have a leak in the central heating system

toptrish, November 2013