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I was planning to replace the mid flow actuator with an identical one and switch the wires like for like. But from what you're saying it possibly sounds a little more complex than that? Do you think there is a fault within the electrics of the boiler?

Thanks for the information. So is there something I can do or am I looking at having to get a professional in?

Yes that's correct. The thermostat is calling for heat so it should come on, but the valve never moves over to CH without manual intervention. However even after manual intervention the system runs for a few minutes (2-3 mins approx) then stops. I can feel the radiators have started to get warm...

Can anyone help? I have a BG330 condensing boiler powered central heating system. About a month ago the boiler faulted with an F5 fault relating to an Overheat. Using this forum I was able to find the Overheat thermostat reset switch which got the boiler back online. However now the...

Thanks, the link it confirmed what I'd found in the manual moments earlier, and the reset got the boiler back on line. What would cause it to trip though? Now, however I am left with another issue. After hours of tinkering it appears that the CH and rads work when the HW is timed to come on...

No work has been carried out. The system has been running for short periods over the last few months, and then recently for longer. Everything was fine two days ago. I did bleed the radiators as one felt cooler in areas but got very little air out. According to the manual the F5 fault...

Hi I have a Glow Worm BG330 boiler which is coming up with a F5 fault. From what I have gathered so far, I understand this more than likely has something to do with low pressure. However having searched the loft and piping within the cupboards I cannot locate a filling point and associated...