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Low coolant, bad coolant, blockage in the coolant line, bad heater core or element, bad thermostat

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12y ago
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Q: What causes a night heater to blow cold air?
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Related questions

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 would the heater on your bravada only blow cold air?

Possible causes are, low on coolant, thermostat stuck open, clogged heater core or vacuum scorce not getting to the heater control.


What intermittently causes the heater to abruptly blow cold air at the same time the temperature gage indicates?

Air in the water system.


What causes the heater to blow cold air when the engine is overheating on a 1999 Cadillac Seville?

Low coolant. If the coolant is low then the heater core is not able to transfer heat in to the car.


What causes your 1995 Chrysler LeBaron to overheat and heater to blow cold air when you are stopped and cool down and blow hot air when you hit your accelerator?

Your coolant level is low.


How will the heater react if the heater core is stopped up?

Your heater will blow cold air only.


Why would a house heater blow out cold air?

It doesn't really blow it out it just warms the cold air.


What causes a 2000 dodge durango's heater to blow cold air when the thermostat ans heater core have been replaced with new parts?

The temperature blend door may be at fault.


What causes a heater to blow hot air as soon as you turn it on but then to blow cold air?

If the car is setting in the sun.Heat builds up in the ducts. With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!


What causes a Pontiac Montana to blow cold air?

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