baxi combi 105 he, no central heating?

overpressurising will not cause boiler to not work on a 105e just will cause the pressure relief valve to operate. check the boiler is in heating and water mode and room stat turned up/ heating potentiometer on boiler front. does boiler fire at all on heating ? if it does make sure all valves underneath boiler are open

stevio
October 2008

Have followed your step and reduced the pressure to 1.5 bar and it still does'nt work. the receiver doesn't appear to be receiving any power, has something blown from being over pressurised, if so what and what do i need to do next? thanks!!

Karen
October 2008

Almost certain someone has left the filling valve open which will cause it to over pressurise and to not work.

meheatandplumb@aol.com
October 2008

open radiator bleed screw and catch water with old towel/container or similar until pressure goes back down to around 1.5 bar.

iain
October 2008