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hot water goes cold?

my ferroli boiler modena 102 the hot water comes on then goes cold and stayes cold
lisa, December 2009
Had the same probs on a modena today,turned out to be dhw sensor but replace both ch sensor and dhw sensor

gizzi, December 2009
sounds like your diverter valve is faulty and may need replacing

jonathan, December 2009
link Click here to see other fixes for Ferroli.