biasi m90E 28s boiler fault.

[sumodan]

Hello,
This is my first post on here so sorry if I dont provide all of the info you need. These are the symptoms:

DHW is working no problem, unfortunately the CH just is not working. I have taken the cover off and checked to see if it is anything obvious but sadly not. Whilst I have had all the covers off I have turned the tap on and the boiler fires up no problems. If i turn it off and then back on at the wall a few times it might fire up for a few seconds but then cut out. The whole process works fine Fan, pump, ignition but just wont stay on. Please help...........

 

[Agile]

Have you set the controls correctly?

Room stat up?

Right knob well clockwise?

Time clock showing "on" in the display?

Tony

 

[sumodan]

They are all on mate. I have found something weird this morning tho. I don't know what the part is called but underneath the divertor valve their is a green plug that when unplugged and re onnected it fired the boiler up but only when I rapidly tap it back together. Hope that makes sense. Any ideas? Thank-you for your reply.