Ideal Response 120 Combi.
My girlfriend recently had issue in that the CH pressure dropped to zero so no hot water etc. She 're-pressurized' the system & now it's constantly over 3 with water overflowing outside & from one of the radiators (from cap opposite to bleed valve!). We drained this radiator & re-filled (without re-pressurizing) & the pressure dropped to 2 but has now crept back up to over 3 again. Any ideas?
Thanks to you both for your answers - I had a little 'fiddle' with the tap for the filling loop & the pressure has now dropped to 1. Either it wasn't off totally (altho' it felt like it) or there was a piece of grit lodged in the valve.
Andy W
April 2007
Fill the system when cold (the boiler not the weather) then run the system untill it is hot. If the pressure rises past 2.5 or 3 bar or the pressure relief activates, then the pressure vessel will need replacing.
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