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Mend Bosch C1 Central Heating Boiler Fault

How can we fix our Bosch C1 central heating boiler?

Our Bosch C1 central heating boiler has the water light flashing and according to the basic instructions on the cover we have an Air Flow fault.
Is this anything we can fix ouselves until an engineer arrives?

Lynda Baker
December 2010
BoschBosch C1Heating, Home Heating SystemsCentral Heating Boiler Fault

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Bosch C1 Boiler: Air Flow Fault - Fixes?