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Mend Worcester 24i Fault Hot Water Flow Switch

Worcester 24i rsf no hot water?

I followed the fault diagnosis and replaced the flow switch. However the boiler reset kept tripping out (overheat thermostat). I replaced this and the heating is working perfectly but no hot water at all. When there is demand for hot water the boiler does nothing - like it hasn't detected it at all - the fan doesn't start, nothing! What's next? Could the new flow switch be faulty?

Rob
October 2008
WorcesterWorcester 24iHeating, Home Heating SystemsFault Hot Water Flow Switch
Easy enough to check - use a multimeter and check for continuity through the two pink wires when a tap is running.

If switch is making, and boiler not responding, then board fault.

BunSlinger
October 2008

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Worcester 24i No Hot Water - Fixes & Help