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How can i fix my Ariston Euro Combi Boiler (model: SX20 MFFICE)?

I think my boiler is over pressurised. Started with a leak, tightened it. Then another leak at another location. And now i have just found another one. Whenever i tighten one leak, another one appears. The radiators are also heating halfway. I really think there's something to do with pressure in the system.
Merv, January 2007
you want to get the pressure back down to about 1-1.5bar. cold rads at bottom is useally due to sludge build up.

hi-spec plumbing, January 2007
The radiators are hot only on the sides and at the top. The bottom and middle are cold.

The gauge is reading 3 - 4 bars.

Merv, January 2007
Are the rads cold at the top or the bottom?

GasAid.co.uk, January 2007
what is the gauge on boiler read

hi-spec plumbing, January 2007
link Click here to see other fixes for Ariston SX20 MFFICE.