suspect diapragm in the heat exchanger allowing the pressure to buld up from the normal 1 bar to up tp 3 bar i have to keep draining wate every 1 to 2 days
sime freindly format 80e
hi i have a vailant eco pro 28 boiler and when the heating is on there is a tapping noise comeing from the boiler and now it has started to make a loader noise
Angela, January 2010
It could be something simple like the boiler fill tap is not turned completely off or as the previous answer rightly states, it needs the pressure vessel replacing.
bigclive, April 2007
soundslike your expansion vessel is full of water it needs pumping out phone me 07710230494 for any bioler problems
