Has any one had the fan relay on this boiler click on and off randomly? This only happens when the unit is cooling down. The boiler is otherwise working OK.
The boiler is approx 4 years old, it feeds a conventional h/water storage tank and rads.
I have managed to solve my problem by fitting a 470nF 500V AC Capacitor (Maplin part RG25C) across the Orange and Blue wires from the V4073 Mid Point Valve.
Hope this helps
Paul K
September 2012
Sounds like the same problem I have.
This seems to only happen when the Central Heating switches off, either with the Hot Water or on it's own.
I am slowly checking out the circuit but there seems to be a stary 50V floating around from some where which all seem to be pointing to the boiler
Paul K
September 2012
Mine has just started doing this did you find the problem?
Many thanks
Mel
January 2011
started happening on mine as well 2 years old.
when the boiler shuts down and overrun fan kicks in it clicks untill i reset the boiler or it cools down.
i did jumpthe main central heating pump to run when it was clicking and it stopped after 15/20 seconds.
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