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.

Andy_Hamilton

I would say you need to bleed the radiators, all of them.

plumb1_2

You also need to flushout the system.

gartshore

sounds like you have not cleansed the system properly you would have been better powerflushing if sludge is the problem , you have only circulated the sludge or maybe as andy says have you aired the system .