How can you tell which is supply vs return? · if the central heating is active (boiler on), then the fault does not occur. But if the boiler is not active, and the call for dhw … · frankmaster47 my boiler isnt working help i dont understand the problem because water is going in but steam isnt … · its all good until the boiler is not boiling and capped at a 460fuel burn rate, if i go above that, the sodium is not cooled fast … Green circle is supply and red circle is return … 21 votes, 63 comments. And what size home do you own and is your steam boiler powered by gas or oil? · boiler return vs boiler supply, ?
