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    Boiler turning off after startup. Need a new PCB?

    Boiler turns on with display and then turns off. I think it turns off as soon as pump turns on, not sure. Diverter valve was replaced 6-8 months ago. There has been couple of F70 error before and after the diverter replacement. What could be at fault? Likely cause is a PCB? Here is youtube link...
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    Flush (not powerflush/drain) CH system

    Hi I want to flush CH system after adding x400 and leaving it for a 3-4 weeks. I'm planning to open drain valve while opening the mains water into CH system, hence flushing (not draining), one rad at a time. Correct me if I'm wrong. My challenge is that automatic bypass valve will not allow...
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    MagnaClean on flow

    Hi I'm planning to add MC5+ cleaner to the system as there is a lot of sludge & rust. My concern is that since magnaclean is fitted to flow, the boiler may end up with debris and create problems. I'm planning to drain the system in a week's time and at that point will change the pipework...
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