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Are your radiators hot at the top and cold at the bottom? There are a few reasons that may be causing your radiators to have cold spots. In this article, we discuss what may be causing the hot and cold patches in your radiators and how to fix them.


Why Is My Radiator Hot at Top Cold at Bottom?

If your radiator is hot at the top and cold at the bottom then there may be air trapped or build-up of rust, sludge or lime scale obstructing the flow of hot water which is preventing the bottom section of the radiator from getting warm. To solve this issue, we recommend bleeding your radiator if this doesn’t work you will need to flush the heating system to get rid of the build-up. If you need help on how to bleed a radiator then click the link to view our easy 8 step guide.

Why Is My Radiator Cold at The Top?

Radiators that are cold at the top and warm at the bottom are often caused by trapped air in the radiators. To solve this issue, you will need to release the air trapped in the radiators, this can be done by simply bleeding the radiators. For more information please read our how do you bleed a radiator article.

Why Is My Radiator Cold in The Middle?

The cause of a cold radiator in the centre may be because of a build-up of rust and sludge. Rust and sludge prevent hot water from reaching the bottom section of the radiator. To solve this problem, we recommend cleaning your radiator thoroughly.

Why Is My Radiator Cold at The Bottom?

Radiators that are cold at the bottom can be caused by a build-up of rust, sludge or lime scale. This restricts the flow of hot water in your radiators causing the cold patch at the bottom to resume the flow of water flushing your radiators will get rid of central heating sludge and debris. You can flush the system yourself using a sludge remover that can be bought from most DIY stores.

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