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What causes a car to over heat and the heater to blow cold air?
Wiki User
∙ 16y ago
broken thermostat would cause this. depending on how much the car has overheated, and how often, you may need a new engine block/head/gasket, due to the irregular heat cycles of this engine. if the heads or the block are warped bad enough, you can check your engine oil. if it looks like chocolate milk, or has a watery film mixed with the oil, you have a blown head gasket or a warped cylinder head. this will cause major problems with your engine, requiring it to be rebuilt or replaced completly. also, check your coolant level. if the coolant is low, you will have problems opening the thermostat. the only way you should be loosing coolant is if you have a leak somewhere... this leak can be caused by a loose hose connection, a blown head gasket, a warped engine block, a wapred cylinder head, or a couple other problems. no matter what, check your oil for coolant.
Wiki User
∙ 16y ago
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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.
Why does the heater blow heat while driving and cold at idle?
you need to replace your heater core
How can you tell if heater blower is not working?
it wont blow heat itll blow cold air
Can a thermostat cause heater in house to blow cold air?
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.
What causes the fuse to blow on a F250 when you turn on the heat?
Ck the heater fan motor resistor .
1998 Mazda b2500and when you turn the heater buttom to make it blow cold air doesn't change and still on heat?
if youre trying to turn the heater on and cold air comes out, then its most likely the heater core
In your truck when you switch from cold air to heat the air still blows cold?
Interior heat uses the engine heat. If the engine is still cold, the heater will blow cold. If the engine is warm and the heater is blowing cold, you have a problem with the heater. Check the water in the radiator and see if it is rusty. If it is rusty, change your coolant, thermostat, and hoses. Look at the heater hoses when someone steps down on the gas pedal. If a hose collapses, replace your heater hoses. Otherwise take it to a mechanic.
Why does the heater not blow air?
The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.
On a 2004 grand prix what would cause the heater to blow cold air?
heat core. leak. thermostat. no antifreeze.
Will a cracked head gasket on a 1996 Subaru Legacy L 2.2L cause the car to overheat and the heater to blow out cold air also?
the blown head gasket would make it over heat. but it wouldn't cause the heater to blow cold, it should actually blow hot if that is wat happened
Why does heat in 1998 Dodge Grand Caravan blow cold?
Low Coolant? Bad thermostat? Heater core plugged or restricted? Heater core airbound? Heater control cable not working?
Why does the car heater blow cold air until driven for a while?
it has to heat up, just like water has to warm in the faucet.
