Boiler fault

[michallem]

Hello everyone. I was wondering if anyone came across this boiler fault:

https://drive.google.com/file/d/0B71SP68tu1xGdmIycjZlNFRBQWM/view?usp=drivesdk

This happenes when boiler is not working. When I switch heating/hot water on, on evohome, fault seems to go away for a while (not always).
Would it be something to diy fixing or rather call in engineer.

 

[J_N30]

You'll need a Gas Safe registered engineer but sounds like your getting back feed from the room stat at the PCB. A resistor at the PCB terminals should sort it.

 

[ollski]

I'd say 60 / 70v back from the mid position valve but the solutions the same

 

[J_N30]

I'd say 60 / 70v back from the mid position valve but the solutions the same

Yep same difference but agree timer-roomstat-mid pos-boiler

 

[michallem]

Hi everyone. My problem seems sorted but sorting this one, made other problem appear.
I've called plumber, after consulting Worcester people they fitted a 120 resistor. It stopped the clicking. But after this I discovered that boiler will heat up water without demand, it can heat it up to 84c! I can see exact temperature on our evohome system. First thought was - faulty mid position valve. It has been replaced with a new one but it's still happening. Could this be related to this resistor fitted? It definitely wasn't happening before the clicking problem. Also, boiler fires up for up to 1min when there is no demand from heating/hot water.

 

[wannocks]

That resistor is a capacitor.

 

[DP]

That resistor is a capacitor.

Package contains both components