where do i findvalves on ferroli he plus 35 s?
the window on the front of this boiler is flashing f37. manual does not say clearly what to do. there are 2 valves under boiler one red and one blue. i switched of electricity supply then turned both valves completely but nothing happened. there is nothing else under the boiler to turn except the yellow gas button.....help....
irene o connor, July 2012
