WB 18ri fan running when no call for heat

[Stoney Ground]

Got above where when heating switches off boiler is getting a feed from somewhere, causing clicking noise as it tries to go through start sequence. Where would it get it from, through cylinder Stat or 3 port.
Going there tomorrow to check it out but wanted to grab a replacement just in case.

 

[Gas74]

Got above where when heating switches off boiler is getting a feed from somewhere, causing clicking noise as it tries to go through start sequence. Where would it get it from, through cylinder Stat or 3 port.
Going there tomorrow to check it out but wanted to grab a replacement just in case.

Probably the end switch in 3 port????

 

[king of pipes]

Most likely a back feed on the 3 port time to get the multi meter out . kop

 

[SavageW]

There is a capacitor suppressor that you can fit between N & SwL at the PCB If it is a back feed from a 3ort

 

[Stoney Ground]

Where can I get these, is it something WB know about. Will speak to their technical tomorrow

 

[SavageW]

I work for a company mate,that’s where I heard about this.Quick google search an they are readily available from local places. What did WB tech say?

 

[Stoney Ground]

Exactly that, have one coming in today.

Will fit it Monday

Thanks for info,

 

[thereisawizza]

Some early Viessmanns have this suppressor as a spare too when using a 3-port...