Potterton 70 HE fire up problem

[dingodog]

First of all a Merry Christmas to all
The boiler will start ok from cold but once it's been running a while it goes into the start up sequence with the pump and fan cutting in and then immediately off and keeps repeating this process until it eventually starts up. Both or either MRV's are opening and no fault lights are showing. Not the best time of year to happen either but Hey Ho just hoping it's not the dreaded PCB and someone on this forum could help, thanks in advance.

 

[Dotty]

Yep, not a problem.

What you need to do is lift the phone to call a gsr.

We do not discuss boiler repairs unless you are properly qualified, trained and competent to do so, and then only in a private sub forum out of public view.