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the plumber i used,when he changed the heat exchanger reckoned it was a right pig of a job to do!he said he didn't fancy doing another one!

thank you for the replies,the radiators have been bled,there was a lot of air in them with the pressure problem at first but the thermocouple,i do not know?this has cost me £350 so far so to have a new boiler after that would be heart breaking!

hi, i had trouble with dhw system going hot & cold quite a while ago.local corgi plumber found trouble with the boiler maintaining the right pressure due to a faulty inlet valve!that was replaced and the pressure is a constant 1.5 bar but still the dhw fluctuates.he then changed the thermistor...