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how can i fix my worcester 28CDI RSF boiler?

d h w flashing 5 times per second.
paul furlong, April 2010
Hi, this is Worcester, Bosch Group

Our technical team can help with enquiries - please call 0844 892 3366.

We look forward to helping you.

Worcester, Bosch Group, April 2010
may be faulty fan, air pressure switch or pcb

Ian, April 2010
press the red button on the front o the boiler

erj, April 2010
link Click here to see other fixes for Worcester.