radiators warm at the top but cold on the bottom Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[tfella]

My radiators are cold at the bottom yet warm at the top. This problem is usually the opposite way round so do they just need bleeding?

[AdamsHeating]

If you bleed and they are full you probably have a blockage/sludge build up. Might need a cleanser running through it or power flushing.

[Loffa]

If its an old system it probably needs a powerflush or at least taking the rads off and flushing through individually. They are more than likely sludged up.

[Steve the gas]

Hi Fella,

Cold at top = air, therefore bleed.
Cold at bottom = sludge or circulation problem, therefore powerflush or diy drain down flushout several times then add inhibitor.


Hth