The thank invites, your problem describes me not to understand a bit with yours, what you ask is the issue with heating backwater large pressure, say central heating pressure is little again next, bring about a loop bad central heating is not hot, this I am a bit dizzy, do not know how to answer you, I asked two questions when you, will to you say in turn.
Be heating backwater pressure above all problem, I suggest you see the central heating conduit in next homes and radiator, ensure not old old corrupt place, if pressure is too great, have ageing problem plus central heating conduit and radiator, appear so easily the danger of cartridge igniter, wided yourself's building does not say, downstair user if also by bubble, then you have big trouble.
Big to heating backwater pressure this kind of circumstance, suggest you close central heating valve, do not want privately processing, the person that seeks know the business will undertake debugging, perhaps contact heating unit directly, undertake reparative safeguard, lest have bad thing,happen.
Again for the heating that says you are described sends a loop bad, central heating does not heat up this problem, if belong to solid word, this kind of problem is heating pressure station is hit more press what bring about not quite, this you must contact heating unit to have negotiation directly, general nevertheless and ordinary common people two be no good this kind, family manage pays no attention to you to still say to be less than, best and OK much connection and you are same the person of the state, the person finishs sth more affection became great they just can give you seasonable and serious processing.
Still a kind of circumstance has person privately to put central heating water to undertake he is used namely, if have this kind of problem, no matter pressure is enough, central heating is met all the time heat addition is insufficient, because give off the hot water that go to need new hot water, and the water that adds afresh is cold water, need heats afresh, so this problem solution rises definitely very give or take a lot of trouble, having some of person after all is selfish, did not have method this, hope the problem of your heating is solved at an early date.