Heating Symptoms
Identify what your system is telling you—and whether a professional power flush is the right fix.
Cold Radiators
Cold at the bottom but warm at the top? Sludge is blocking circulation.
Read guideNoisy Boiler
Banging or kettling noises often mean scale and sludge in the heat exchanger.
Read guideBlack Radiator Water
Dark water when bleeding means internal corrosion and magnetite sludge.
Read guideConstant Bleeding
Trapped gas from corrosion can mimic air locks at the top of radiators.
Read guideSlow Heating
Radiators taking over an hour to warm up? Circulation is restricted by sludge.
Read guide