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Could be a stuck open thermostat or low on coolant or the temperature blend door is faulty.

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Q: Why does your car blow cold air instead of hot air when used?
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What causes a cars heater to blow cold air?

THE CAUSE for this is that when your cold air is on the petrol is used to create air. and that is how cars create cold air


Why does the heater blow cold air instead of warm air?

The heater may blow cold air instead of warm air due to issues such as low coolant levels, a malfunctioning thermostat, a clogged heater core, or a faulty blend door. These problems can prevent the heater from properly warming the air before it is blown into the car.


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A furnace may blow cold air instead of warm air due to issues such as a malfunctioning thermostat, a clogged air filter, a problem with the pilot light or ignition system, or low fuel supply. It is important to troubleshoot and address these issues promptly to restore the furnace's proper functioning.


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What would make your 1991 Nissan Maxima blow cold air instead of heat?

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Why would a house heater blow out cold air?

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Why does heat pump blow warm air instead of cold?

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