I have a sime planet super 4 WM that every so often, about every fortnight goes mad all the lights light up and the 2.5 bar light flashers red.( like Blackpool illuminations) 
There is no water coming out of the PRV, i've had the expansion vessel changed and the system has been set to 1 bar (cold). Everything else ie: heating and water, is spot on. But these lights and ticking noise is driving the missis crazy.
Can anyone please help?
There is no water coming out of the PRV, i've had the expansion vessel changed and the system has been set to 1 bar (cold). Everything else ie: heating and water, is spot on. But these lights and ticking noise is driving the missis crazy.
Can anyone please help?
