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ferroli modena 102?

c/h heating works ok hot water runs cold when hot tap turned on boiler does not fire up
jon kitson, February 2010
I have same problem and today tracked it down to the timer unit being faulty, removed the timer and shorted the switch connections and hot water works fine as does gch, ordered new timer from ebay

Andy, December 2010
probably a faulty flow switch inside boiler

dave the rave, February 2010
link Click here to see other fixes for Ferroli.