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Pump it is possible , but the pump is working for the hw O.K ?? Reply: Yes - The water works fine On this model if my mem serves me correctly ?? the max temp of hw u can get is 55 degs c ( I think ?) which means max temp the boiler will get to when in the hw mode is 75 degs C approx as...

Hi Transam, Thanks for the reply? I don't know if the other engineers checked the "bypass" on the system or in the boiler. If their ok, do you think it's possibly the pump. If their not I'm guessing they need sorting. Or do you think its a different boiler stat? Really not sure...

Thanks Libby, didn't know you could do that? Will definetly try and track if thats feasible. Will keep it in mind. If you've got any suggestions of a company that provides such a service I would love to get it in touch. That would be helpful. Thanks....

thanks for the reply. I have had two gas safe registered engineers around to check the boiler. The first said we needed a power flush, which did help but not solve the problem. The second is suggesting replacing the pump and/or the PCB. Could it be anything else before we go ahead with...

The model is a Biasi M90F 24S. Problem:The boiler cuts out and requires manual reset button. It then overheats and repeats. The DHW is fine and doesn't cause tripping. Thought it was a circulation problem. So a powerflush was done, but it hasn't solved the problem. Looked at the pump and...