Worcester Bosch 35kw condensing combi A1

[tidyboiler]

Aye .... I would say you've just found the problem - it's not designed to work on its side!!

Like somebody else I know

 

[marc8]

Hi all put pump in late last night ran up to syphon fill program then showed A1 again
done this about 10 times, could here air escaping first two times on pressure unit on side through vent but still doing it?
Do I need to lower pressure & check charge on red vessel?
Any help would be most appreciated

 

[marc8]

Hi all thanks for help at bottom of problem now,
but here was a tip I was given
unplug the pump speed modulator clip, the pump will run all time run boiler again no A1 hot water hot & ch hot, put back on modulator clip if it goes to A1 then there is a pub board comm problem & new PCb board as it was for me.

 

[Corbs]

Hi all put pump in late last night ran up to syphon fill program then showed A1 again
done this about 10 times, could here air escaping first two times on pressure unit on side through vent but still doing it?
Do I need to lower pressure & check charge on red vessel?
Any help would be most appreciated

so air is escaping all the time and yes you can check the pre charge in the expansion vessel and the pre charge should be listed on the vessel and yes you might hear air escaping when you fill the system up pressure due to the air valve letting the air out

 

[Corbs]

Hi all thanks for help at bottom of problem now,
but here was a tip I was given
unplug the pump speed modulator clip, the pump will run all time run boiler again no A1 hot water hot & ch hot, put back on modulator clip if it goes to A1 then there is a pub board comm problem & new PCb board as it was for me.

there the worst all because of the eco effi of the thing