Humming, knocking or water sounds from a combi boiler may be caused by air, pump strain, limescale,...
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Flue, air pressure and combustion safety error codes can indicate a serious boiler safety issue and...
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If the boiler runs but radiators do not heat properly, the cause may be trapped air, circulation, ba...
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If shower or tap water keeps switching between hot and cold, the cause may be flow sensing, a divert...
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Repeated pressure loss in a combi boiler may point to a leak, expansion vessel issue, safety valve d...
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