Radiators cold at top? or have cold spots?

Radiators cold at the bottom due to the build up of sludge. Sludge can seriously affect the efficiency of your central heating system, and lead to higher fuel bills

Without treatment, corrosion debris will accumulate in the boiler causing
increasing limescale deposits, reduced heat transfer and up to a third of a fuel bill going to waste.

A power flush restores systems with circulation and boiler noise problems (caused by sludge and corrosion deposits) to optimum operation. Power flushing removes these deposits and the problems that they cause. The powerful flow, combined with specific cleaning chemical/s dislodges and mobilises deposits and corrosion which resist the traditional 'cold-hose' flushing method.