Mend > Home Heating Systems

Worcester Bosch 24Ri -Relay clicking?

Hello !

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.

Jerry - Notts
March 2010

Worcester Bosch Worcester Bosch 24Ri Heating, Home Heating Systems Worcester Bosch Boiler Relay

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.

andy g
April 2010