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low water, bad thermostat, vacuum door not working, clogged up heater core, heater valve broken........

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โˆ™ 2006-03-22 21:59:57
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Q: What would cause a car heater to not get hot?
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What cause your heater to go from hot to cold when the car warms up?

because it needs to cool down if it gets too hot


What cause a car not to produce hot air inside the car?

It could be a number of things, depending on what kind of car you have depends on some components that could be the cause of the problem. First thing I would check is heater hoses/heater core, if both the hoses are hot with the car warmed up and the heater on, then that eliminates blockages in the heater core/ hoses. If they are not both hot, then you may have a blockage in the hoses/core, or a faulty heater valve or controller. Another thing that may be the problem, is the blend door actuator, it controls how much hot/cold is allowed to enter the passenger compartment. That's most of the heating system for most vehicles. If you still cant figure it out, then its probably time to take it in for service.


What would cause a car to lose heat?

Your heater is powered by your heater core. Your engine coolant runs through your engine gets hot, runs through the core heats the air, then back out to radiator. You probably need to replace your heater core.


What is the point of using a hot water heater?

It is a water heater, not a hot water heater. There would be little point in using a hot water heater. I assume that is your point.


Why would smoke come out of the ac vent?

smoke coming from a/c vent indicates that the heater core is leaking and needs to be replaced.this smoke is hot antifreeze, it will not cause a fire but it does stink and will eventually cause car to overheat


What would cause hot water to be brown?

Older heater with rust build up in the bottom of the tank.


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


What would cause the heat to stop working and engine to run hot on a 1996 Cadillac deville?

Heater coil


How does a car heater work?

[first time answering questions] car heater works like the reverse of the normal cooling radiator - in fact the heater is like a small version of the rad that's on the frnt of the car - the hot water from the engine block goes into this small rad and the heater fan blows air thru it into the car - the hot heater rad loses heat into the car and - bingo - you get warm inside


My car is blowing out cold air not hot when the heater is on.?

You need to change your thermostat in the car.


Does heat in a car run off gas or oil?

The heater in your car uses waste heat generated by the engine. The hot coolant from the engine flows through the heater core causing it yo get hot. A fan then blows air over the hot heater core into the vehicle.


Why would a thermostat run hot and the car heater blow cold air?

Insufficient amount of coolant or thermostat not opening


What would be the cause of the heater not getting hot on a 1988 Sedan Deville?

1 of a 100 but the 1st to check . BAD THERMOSTAT


How do you know if heater core is reason for radiator getting hot?

Since they run in parallel, there's no way that a heater core will cause a radiator to get hot.


What is a heater core?

The heater core is a small radiator inside the car under the dash that hot water circulates through to heat the inside of the car.


On a 1998 Chevy Blazer what would cause the heater to blow hot air then cold and occasionally back to hot?

Either a faulty thermostat or you have a low coolant level.


What would cause the hot water to run out quicker than it used to?

If it is a electric water heater, then one of the heating elements are burned out.


Why heater won't get hot in 2000 Chevy Camero?

it could be a few things, but id check the thermostat as its probly stuck open, or your heater core could be bad but that will cause a water leak in your car and its a pain to change. or you can check your heater hoses for sludge.. because 50/50 anti freeze tends to cause that


What happens when the heater motor will not turn off?

your car gets warm............ or hot........


Does a car heater need gasoline to work?

The engine has to be running and warmed up for the heater to produce hot air. So yes, you need gasoline to get heat from your car (unless you have an electric car).


How can you fix the heater on your 2002 Saturn?

First check the coolant level, a coolant leak would cause a heater to stop working- assuming you mean the blower is blowing but it isn't hot. A stuck thermostat will also cause you problems with your heat.


No heat in a 1991 Chrysler LeBaron good blower?

If the blower is good then the problem is coolant. Something is stopping the warm coolant from the engine from reaching the heater core inside the car. This might be thermostat, heater control valve, blocked heater hose or a blocked heater core. I would suggest letting the car warm up and checking the heater hoses (2) by hand to see where the hot water stops. If there is no hot water at all it is probably a thermostat problem.


What could cause the heater or defrost to NOT blow warm or hot in a 1988 Ford Bronco ll?

Blocked heater core, faulty heater valve, disconnected connection to the heater valve.


Have replaced the t-stat in my car It did not have one when i got the car And now the car is over heating and the heater will not blow hot air Don't think it is heater core?

Sounds to me that the thermostat is in backwards.


Why would hot steam blow from the heater vents?

Leak in heater core. Replace core.