Some of my radiators are hot at the top, but cool at the bottom in the

Rafal Kaczynski

Hi Mark yes your heating system required power flushing. Sludge build up on a bottom of your radiators and blocked radiators chanels in side not alowing water to flow correctly that's why radiators are worm on a to.p Power flushing or chemical flushing ( if power flushing won't help)will resolve a problem. Do not forget to ask engineer for fitting of magnaclean filter to prevent sludge buiding up in a future. I hope this will help. Regards Rafal