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Mend Viessmann C22/24 Boiler Heating Flashing Code

hs or h5 is flashing?

i have a evo he c22/24 boiler and hs or h5 is flashing do you know what this is???

danny c smith
May 2010
ViessmannViessmann C22/24Heating, Home Heating SystemsBoiler Heating Flashing Code

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Viessmann C22/24 Error: HS/H5 Flashing - Help