Why have I got cold spots on my radiators?
If you notice cold spots on your radiators, where certain areas of the radiator are not heating up as expected, it could indicate a few potential issues that include,
Air in the system: Air trapped inside the radiator can prevent proper heat distribution. When there are cold spots, it's possible that air has accumulated in those areas. Bleeding the radiator by using a radiator key to release the trapped air can help resolve this problem. Start by turning off the heating system, allowing the radiator to cool down, and then carefully opening the bleed valve at the top of the radiator to release any trapped air until water starts to flow consistently.
Buildup of sludge or debris: Over time, sludge (Magnetite), rust, or debris can accumulate within the central heating system, including the radiators. This buildup can restrict the flow of hot water, leading to cold spots. Flushing the heating system or power flushing can help remove the sludge and restore proper circulation. We offer Powerflushing services to combat this issue. https://tdpheating.co.uk/services/power-flush
Faulty radiator valves: The radiator valves control the flow of hot water into the radiator. If the valves are faulty or partially closed, it can result in cold spots. Check that the valves are fully open and functioning correctly. If they appear to be damaged or not operating as expected, they may need to be repaired or replaced.
Blocked or partially blocked pipes: Blocked or partially blocked pipes leading to the radiator can impede the flow of hot water, causing uneven heating. This issue typically requires professional attention from one of our heating engineers who can inspect and clear any blockages or obstructions in the system.