I read somewhere that you could undo the pipes below the boiler and backflush the main HE to get rid of some crud.
So I wouldnt need to touch the boiler at all if this were the case. Its just knowing which valves to turn off etc.
Thanks for the advice. Really appreciate it.
Could I ask: just a rough guestimate how much a new main HE would cost for the a23MFFI fitted.
Im in North Yorks, York.
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