Category Archives: Faults

Heating but no hot water: what causes it & how to fix it

Got heating but no hot water? This fault is much more common in heating systems with a a hot water cylinder. If you have a combi boiler, it’s usually due to a faulty diverter valve. This valve controls whether the … Continue reading

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One radiator not working: 5 common causes & how to fix

One radiator not working is usually the result of poor water flow. Typical causes are seized valves, blockages, an imbalanced system, or the presence of air. In this article, we’ll explain what you can do to fix this problem. How … Continue reading

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Radiators come on with the hot water – why?

If your radiators come on when you open a hot tap, you probably have a faulty diverter valve or motorised valve. These valves control whether your boiler heats the radiators or water for the hot taps. Which one you have … Continue reading

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Hot water isn’t hot enough: 9 possible reasons

If your hot water isn’t hot enough, it may be due to your boiler, thermostat, or even the time of year. Whether you have a combi boiler or a hot water cylinder, we’ll go through several possible causes. Hot water … Continue reading

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Boiler Kettling: Why is the boiler making strange noises?

Boiler kettling is usually the result of overheating due to internal limescale or corrosion, or insufficient flow of water. Boiler kettling is often used to refer to any kind of unwanted boiler noises, like banging, rumbling or whistling. Most boilers … Continue reading

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