Cold Central Heating

[Ifti]

Hi,

we have had around 5 new raidiators put into our Centeral Housing house and the two old ones have sludge build up in them so we recently put a cleaner in our central heating system to clean out the sludge,
but i have noticed that none of old the heaters are warming up. the new raidiators are turned off but the old ones are on. we are noticing that not of the pipes are heating up, this being old and new.

please can someone give me any tips on what i should look at and what the problem could be.

 

[ChrisR]

Take the old rads into the garden and hose then through, invert when half full of water, repeat until clear.
If there are too many for that to be atractive, you need careful Balancing if the rads, see the FAQ.