radiators not hot all over Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[daverdisco]

When my heating is on i find some of the radiators are hot at the top yet cold at the bottom , i have tried to bleed them but it seems to mak little or no difference.

[TheDoctor4]

Hi

Have you had a look at the DIY Projects section: https://www.diydoctor.org.uk/projects.htm There are numerous projects related to Central Heating that may provide the answers you're looking for.

Regards

[Steve the gas]

HI Dave,

Cold spots can indicate a sludge build up. Way to check, if you are able, is to drain off one of these rads to check the water/sludge (when cold).

Hth