BAXI SOLO 2 50 PF - PCB Relay Chatter

[cpannett]

I have a BAXI SOLO 2 50 PF boiler that has just started recently to emit a loud buzzing from within the boiler when not in use. When the hot water or heating is called upon the noise disappears and all is normal, but then returns when the pump has shut down after it's operation cycle. On closer inspection the buzzing is actually the chattering of contacts on one of the NAiS 48vdc relays on the PCB board. Is the problem possibly related to the Drayton ACL Mid Position Valve?????. Would be grateful for any help in trying to resolve this issue.
Thanks
Chris.

 

[ChrisR]

Didn't look far, did you...
//www.diynot.com/forums/viewtopic.php?t=89715

 

[baxpoti]

and here


//www.diynot.com/forums/viewtopic.php?t=72459&postdays=0&postorder=asc&start=30

//www.diynot.com/forums/viewtopic.php?t=74581

 

[cpannett]

ChrisR / baxpoti thanks for info. Right enough I didn't look far. Will check threads next time.
Cheers.