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vailiant glow worm turbo max 828e?

what does f22 mean on the boiler please
nicola tweddell, October 2009
Thats correct, set it to 1.5 bar...but the early boiler suffered from PCB problems that gave the same code.

John, October 2009
low pressure i think from memory,

ste, October 2009
link Click here to see other fixes for Vaillant 828E.