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  • mab01uk ·
    Sounds like you need to check the coolant level and top up if it is low. The heater blowing cold normally means there is air in the system due to the coolant level dropping possibly due to a leak. The cooling system will need bleeding of air. The loud hoover noise is the radiator cooling fan cutting in because it senses the engine is too hot. Check this out as soon as possible as driving the car with low coolant can cause serious engine overheating and damage.
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