01
A radiator that is warm at the bottom and cooler at the top may contain trapped air. A different pattern can have a different cause, so note which part stays cold and whether other radiators are affected.
02
If you choose to follow your manufacturer’s radiator-bleeding instructions, turn off the heating and let it cool fully first. Never loosen a fitting on a hot radiator or remove a valve.
03
If you are unsure, see a leak or the problem returns, ask for help. Let the engineer know whether the boiler pressure has changed as well.