Comments on: Why are my radiators not warming up when the central heating is on?

By: Ralph Parmar

Ralph Parmar — Sat, 24 May 2008 04:42:43 +0000

If your pump is circulating the water, check to make sure, then you have an air block and you’ll have to “bleed” the radiators, one at a time starting from the first one. Having this type of heat you should now know how to “bleed” a radiator?

By: Bridget Knight

Bridget Knight — Fri, 23 May 2008 04:55:10 +0000

if it has worked ok before your radiators probably need bleeding.you will need an air key for this. it looks like 1 of those old fashioned keys that you would wind an old fashioned clock with. at 1 end of your radiator you will find a small brass screw, put the key onto this and turn it anticlock wise until water comes out.turn clockwise to turn off.start with your highest radiator.

By: Amiyah154

Amiyah154 — Tue, 20 May 2008 10:58:37 +0000

Check the thermostat to see if it’s calling for heat. If that is all right then I would check the circulator pump. How many zones do you have?Is this a hot water or steam system? is there more than one thermostat? Can give a better answer if these are known

By: Arjun 124

Arjun 124 — Tue, 20 May 2008 05:07:53 +0000

You need to bleed air out of the radiators when you switch on your heating every year.
Normally the top of the rad feels cool only, when air is in the system, but if there’s really a lot of air, the whole thing can be cold.