If your radiator is hot at the top but cold at the bottom, it is not functioning properly and could lead to more complicated issues. This is a common problem preventing radiators from keeping the house suitably warm.
A radiator which has cold patches while the heating is on may have sludge present within it. Sludge tends to accumulate inside the radiator over time, with the build-up eventually blocking the flow channels and preventing water from moving around effectively.
Experts at Boiler Central have provided a detailed step-by-step guide to clean up your radiator and get rid of this cold spot at the bottom. A spokesperson for Boiler Central said: “Unfortunately radiator sludge is a very common occurrence and this is because of the reaction caused when water interacts with metal.
